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Liu, MN

Augustine C. Liu, Bloomington, MN US

Patent application numberDescriptionPublished
20090145458SOLID CLEANERS FOR HEATED FOOD PREPARATION SURFACES - A solid cleaner for heated surfaces is disclosed. The solid cleaner includes a solidifying agent including wax, and a cleaning agent. The solid cleaner is solid at room temperature and liquid at an elevated temperature. Methods of cleaning a heated surface and cleaning articles are also disclosed.06-11-2009

Benjamin Y.h. Liu, North Oaks, MN US

Patent application numberDescriptionPublished
20090084315METHOD AND APPARATUS FOR PARTICLE FILTRATION AND ENHANCING TOOL PERFORMANCE IN FILM DEPOSITION - This disclosure pertains to a method and apparatus to permit changing a filter on the input line to a vacuum deposition chamber without breaking or reducing the vacuum for the deposition chamber and other components in the deposition system. Isolation valves are provided at the inlet and outlet of the filter so the filter can be isolated from the source of vacuum and the deposition chamber for removal and replacement of the filter.04-02-2009
20090293807Apparatus for filtration and gas-vapor mixing in thin film deposition - An apparatus removes particles from a gas/vapor mixture while at the same time improves the uniformity of gas/vapor mixture to create a more uniformly-mixed mixture stream for thin film deposition and semiconductor device fabrication.12-03-2009
20100065972Method and apparatus for liquid precursor atomization - An apparatus for atomizing a precursor liquid for vapor generation and thin film deposition on a substrate. The precursor liquid is atomized by a carrier gas to form a droplet aerosol comprised of small precursor liquid droplets suspended in the carrier gas. The droplet aerosol is then heated to form vapor, producing a gas/vapor mixture that can be introduced into a deposition chamber to form thin films on a substrate. The liquid is introduced into the atomizing apparatus in such a manner as to avoid excessive heating that can occur or lead to the formation of undesirable by-products due to material degradation as result of thermal decomposition. The apparatus is particularly suited for vaporizing high molecular weight substances with a low vapor pressure that requires a high vaporization temperature for the liquid to vaporize. The apparatus can also be used to vaporize solid precursors dissolved in a solvent for vaporization.03-18-2010
20100085569APPARATUS FOR HIGH-ACCURACY FIBER COUNTING IN AIR - The present disclosure has an apparatus for detecting fibers in a gas flowing along a passageway. A laser beam is provided at one end of the passageway and the beam is directed along a length of the passageway through which the gas flows. An electrode system, as disclosed, a quadrupole electrode system is mounted along the passageway to cause fibers carried in the gas to oscillate in a detection zone. A photo detector is positioned laterally of the passageway and detects light scattered by the oscillating fibers and projected through an opening in the passageway to provide an output signal that is a function of the light scattered by the fibers in the detection zone.04-08-2010
20100203244High accuracy vapor generation and delivery for thin film deposition - The present invention involves injecting a liquid and gas into a vapor holding chamber held at a sufficiently high temperature to insure all the liquid injected is vaporized and held in the chamber as a vapor. The gas/vapor mixture is then delivered to the deposition chamber in which the deposition substrate is held.08-12-2010
20110091649Method and apparatus for counting particles in a gas - The present disclosure describes a method and apparatus for detecting particles in a gas by saturating the gas with vapor and causing the gas to flow through a chamber with walls that are at a temperature different than the temperature of the entering gas creating a gas turbulence within the chamber resulting in the gas becoming super-saturated with vapor and causing said super-saturated vapor to condense on said particles and form droplets, which are then detected and counted by an optical light-scattering detector.04-21-2011
20110097507Method for generating charged particles - A method for establishing a calibrating standard for wafer inspection includes depositing solid ionized particles of a known size range with an aerosol onto a wafer. The method also includes depositing particles onto a wafer in a deposition chamber by using an aerosol stream and the solid particles suspended in a gas; ionizing the aerosol stream with a negative or positive charge polarity or both by passing the aerosol stream through a non-radioactive ionizer to produce charged particles and supplying such aerosol stream to the deposition chamber.04-28-2011
20110192909Fine droplet atomizer for liquid precursor vaporization - The present disclosure relates to an apparatus and a method for forming a droplet aerosol for vaporization and subsequent thin film deposition on a substrate. The apparatus includes a mechanism to control the rate of liquid flow through the apparatus, the mechanism including a piezoelectric actuator to adjust the rate of liquid flow and an atomizing mechanism drawing gas from a compressed gas source such that when the gas source conjoins with the liquid, the liquid is atomized to form droplets suspended in the gas thereby forming a droplet aerosol suitable for subsequent thin film deposition on a substrate. The method includes drawing a gas from a compressed gas source and drawing a liquid from a liquid source. The liquid and gas are conjoined in either a coaxial flow relationship or a radial flow relationship or an angular relationship between radial and coaxial flow wherein the gas engages the liquid to faun droplets suitable for vaporization and subsequent thin film deposition on a substrate.08-11-2011
20110220811Electrical ionizer for aerosol charge conditioning and measurement - A method and apparatus are disclosed for exposing particles in a gas in order to cause the charge on the particles to change, the apparatus comprising a chamber with an inlet for the gas to enter and an outlet for the gas to exit. The chamber is surrounded by an enclosure with a conductive wall, the wall being held at a ground potential. An electrode with an exposed tip is in contact with the gas in the chamber, the electrode being held at a different potential from the ground potential. The electrode is connected to a source of voltage sufficient to cause a corona discharge to occur forming ions in the chamber, and creating a region of space with a high electric field intensity and another region of space in which the electric field intensity is lower. The inlet and outlet define a gas flow path from the inlet to the outlet such that the gas flow path passes mainly through the region with the lower electric field intensity.09-15-2011
20110232588Integrated system for vapor generation and thin film deposition - An apparatus and method for generating vapor from a liquid precursor for a thin film deposition on a substrate includes an inlet section in fluid communication with a downstream vaporization chamber section. The inlet section comprises a gas inlet for receiving gas from a gas source through a gas flow sensor and a gas flow control valve and a liquid inlet for receiving liquid from a liquid source through a liquid flow sensor and a liquid flow control valve. An electronic controller controls the gas and liquid flow control valves thereby controlling the rates of gas and liquid flow into the inlet section to generate vapor in the downstream vaporization chamber section for thin film deposition on the substrate.09-29-2011

Patent applications by Benjamin Y.h. Liu, North Oaks, MN US

Bingangg Liu, Plymouth, MN US

Patent application numberDescriptionPublished
20090050565System and Method for Removing Contaminants From Wastewater - A system may be used to remove contaminants such as blood proteins or manure from a wastewater stream. The system may include prefiltering the wastewater stream followed by passing the wastewater stream through a reverse osmosis, nanofiltration, or ultrafiltration membrane. The permeate may be further sanitized. The water output from such a system may meet drinking water standards or may be used for secondary uses such as dust prevention and the like.02-26-2009

Chenguang Liu, Minnetonka, MN US

Patent application numberDescriptionPublished
20110224988INTRACARDIAC ELECTROGRAM TIME FREQUENCY NOISE DETECTION - Systems, methods, and apparatus for identifying and classifying noise of an intracardiac electrogram of a cardiac rhythm management device to prevent inaccurate detection of a cardiac episode are disclosed. In an example, three channels are analyzed to identify and determine whether an episode or noise has been detected.09-15-2011

Chung Tsing Liu, Bloomington, MN US

Patent application numberDescriptionPublished
20090295539HAND HYGIENE DELIVERY SYSTEM - Hand hygiene apparatuses and methods for monitoring hand hygiene and for dispensing hand soap or hand sanitizers. An illustrative hand hygiene apparatus includes a computer, a database stored on the computer, a biometric sensor operatively coupled to the computer, a hand hygiene dispenser operatively coupled to the computer, and a hand soap or hand sanitizer disposed adjacent to the hand hygiene dispenser. The database might include a collection of partial biometric data for a group of persons. An illustrative method may include collecting a set of partial biometric data, providing a biometric sensing apparatus and a hand hygiene dispenser coupled to the biometric sensing apparatus, sensing biometric data from a first individual from the group of persons with the biometric sensing apparatus, identifying the first individual by comparing the sensed biometric data with the set of partial biometric data, and dispensing a hand soap or hand sanitizer from the hand hygiene dispenser onto the hands of the first individual.12-03-2009

Dongming Liu, Eden Prairie, MN US

Patent application numberDescriptionPublished
20080273260Method and apparatus for detecting proximity contact between a transducer and a medium - A method and apparatus are provided for positioning a transducer relative to a track of a data storage medium and inducing lateral modulation of transducer the relative to the track. An element of the transducer is actuated toward the storage medium during the lateral modulation, and atomic interaction is detected between the element and the storage medium because of a change in a response to the lateral modulation of the transducer due to the atomic interaction.11-06-2008

Gongping Liu, St. Paul, MN US

Patent application numberDescriptionPublished
20100267929PRRS Viruses, Infectious Clones, Mutants Thereof, and Methods of Use - The present invention provides isolated infectious polynucleotides, such as infectious clones, having a nucleotide sequence with identity to PRRS viruses such as VR-2332, Lelystad, or others, and optionally further including a deletion in a region of ORF1 that encodes the nsp2 polypeptide.10-21-2010

Guojun Liu, Bloomington, MN US

Patent application numberDescriptionPublished
20100136769GERMANIUM-BASED POLYMERS AND PRODUCTS FORMED FROM GERMANIUM-BASED POLYMERS - Germanium-based polymers are described. In one embodiment, a germanium-based polymer includes a structure given by the formula:06-03-2010

Haiyang Liu, Blaine, MN US

Patent application numberDescriptionPublished
20080276317Detection of Multi-Step Computer Processes Such as Network Intrusions - Multi-step processes such as intrusions into computer networks are detected from individual activities or events such as communications by identifying anchor points (FIG. 11-06-2008
20090201899APPARATUS AND METHOD FOR ROUTING DATA IN WIRELESS NETWORKS - A method includes identifying, at a first wireless node, routing costs associated with routing data to a destination through multiple paths in a wireless network. The method also includes identifying, at the first wireless node, information propagation values associated with the first wireless node and at least one second wireless node. The information propagation values are based on the routing costs and wireless link qualities associated with the wireless nodes. The method further includes scheduling transmission of the data by the first wireless node based on the information propagation values and transmitting the data based on the scheduling. The routing costs may include potential values associated with distances of the wireless nodes from the destination. Also, the information propagation values indicate which of the wireless nodes have a greater chance of propagating the data towards the destination in a single broadcast.08-13-2009
20090268674APPARATUS AND METHOD FOR MEDIUM ACCESS CONTROL IN WIRELESS COMMUNICATION NETWORKS - A method includes identifying a white space at a first wireless node and selecting a channel in the identified white space. The white space includes at least one frequency or frequency band not in use (like a licensed frequency or frequency band). The method also includes identifying at the first wireless node a channel access factor for each of multiple wireless nodes including the first wireless node. The method further includes determining if the first wireless node has a specified channel access factor. In addition, the method includes transmitting data from the first wireless node on the channel when the first wireless node has the specified channel access factor. The channel access factors can be identified and the determination whether the first wireless node has the specified channel access factor can be performed without using control signals transmitted between the wireless nodes. The channel access factor could represent a hash function value.10-29-2009
20100157801WIRELESS MESH NETWORK FOR INTER-COMPONENT DATA COMMUNICATIONS IN SATELLITE SYSTEMS - A network system for inter-component communications in an electronic device is disclosed. The system comprises a plurality of components for an electronic device, where each of the components communicates with at least one other component over a communications medium for a wireless mesh network. Each of the components comprises a communications transceiver operable to determine network traffic load levels for an exchange of communication data between the components, and allocate the network traffic between at least one pair of the components over a plurality of wireless links within the wireless mesh network based on potential-field based measurements at each of the components. In addition, each of the communications transceivers share the exchange of the communication data between the components based on a prescribed priority level for allocation of the network traffic.06-24-2010
20100272090APPARATUS AND METHOD FOR INTERFEROMETRIC FREQUENCY MODULATION TO EXPLOIT COOPERATIVE INTERFERENCE IN WIRELESS COMMUNICATIONS - A method includes receiving a first wireless signal and demodulating data in the first wireless signal using a first demodulation technique. The method also includes receiving multiple second wireless signals simultaneously (where the second wireless signals interfere to produce an interfered signal) and demodulating data in the interfered signal using a second demodulation technique. The method could also include (i) determining that a single transmitter transmitted the first wireless signal and selecting the first demodulation technique in response and (ii) determining that multiple transmitters transmitted the second wireless signals and selecting the second demodulation technique in response. Determining that the single transmitter transmitted the first wireless signal could include determining that a fundamental frequency of the first wireless signal is below a threshold. Determining that the multiple transmitters transmitted the second wireless signals could include determining that a fundamental frequency of the interfered signal is above the threshold.10-28-2010

Patent applications by Haiyang Liu, Blaine, MN US

Haiyang Liu, Playmouth, MN US

Patent application numberDescriptionPublished
20110181120WIRELESS ENERGY TRANSFER - A system includes at least one active energy transfer coil and a first passive energy transfer coil. The active energy transfer coil is configured to couple with a power supply. The at least one active energy transfer coil has an active coupling range. The first passive energy transfer coil is magnetically coupled to the active energy transfer coil and is located within the active coupling range. The first passive energy transfer coil has a passive coupling range. The first passive energy transfer coil is configured to provide energy to a first device located within the passive coupling range and based on energy received from the at least one active energy transfer coil.07-28-2011

Harry Liu, Maple Grove, MN US

Patent application numberDescriptionPublished
20090316462MAGNETIC TRACKS WITH DOMAIN WALL STORAGE ANCHORS - Magnetic shift registers in which data writing and reading is accomplished by moving the magnetic domain walls by electric current. Various embodiments of domain wall nodes or anchors that stabilize a domain wall are provided. In some embodiments, the wall anchors are elements separate from the magnetic track. In other embodiments, the wall anchors are disturbances in the physical configuration of the magnetic track. In still other embodiments, the wall anchors are disturbances in the material of the magnetic track.12-24-2009
20100038735MAGNET-ASSISTED TRANSISTOR DEVICES - A transistor device includes a magnetic field source adapted to deflect a flow of free electron carriers within a channel of the device, between a source region and a drain region thereof. According to preferred configurations, the magnetic field source includes a magnetic material layer extending over a side of the channel that is opposite a gate electrode of the transistor device.02-18-2010
20110007538SYSTEMS AND METHODS OF CELL SELECTION IN CROSS-POINT ARRAY MEMORY DEVICES - The disclosure is related to three dimensional cross-point array memory devices and selecting cells within a three dimensional cross-point array memory. In a particular embodiment, three different voltages levels are applied to bit lines of the cross point array to allow for selection of a specific cell. Series of select devices may be implemented to provide a high voltage and a low voltage to specific bit lines, while a middle voltage may also be provided. In a particular embodiment, the select devices comprise Metal-Oxide-Semiconductor Field Effect Transistors (MOSFETs).01-13-2011
20110193148MAGNET-ASSISTED TRANSISTOR DEVICES - A transistor device includes a magnetic field source adapted to deflect a flow of free electron carriers within a channel of the device, between a source region and a drain region thereof. According to preferred configurations, the magnetic field source includes a magnetic material layer extending over a side of the channel that is opposite a gate electrode of the transistor device.08-11-2011

Patent applications by Harry Liu, Maple Grove, MN US

Hsi-Chou Liu, Woodbury, MN US

Patent application numberDescriptionPublished
20100129878METHODS FOR NUCLEIC ACID AMPLIFICATION - The present invention provides methods for amplifying nucleic acid after isolating nucleic acid from a sample using functionalized support material.05-27-2010

Hsi-Chou C. Liu, Woodbury, MN US

Patent application numberDescriptionPublished
20110189665METHODS FOR DETECTING DRUG-RESISTANT MICROBES - The present invention provides methods and oligonucleotides for detecting drug-resistant microbes, such as vancomycin resistant 08-04-2011

Hsi-Chou Cedric Liu, Woodbury, MN US

Patent application numberDescriptionPublished
20100092949METHODS FOR DETECTING STAPHYLOCOCCUS AUREUS - Methods and oligonucleotides for detecting staphylococci, such as 04-15-2010

Huiwen Liu, Eden Prairie, MN US

Patent application numberDescriptionPublished
20080276696ATOMIC FORCE MICROSCOPY OF SCANNING AND IMAGE PROCESSING - A topographic profile of a structure is generated using atomic force microscopy. The structure is scanned such that an area of interest of the structure is scanned at a higher resolution than portions of the structure outside of the area of interest. An profile of the structure is then generated based on the scan. To correct skew and tilt of the profile, a first feature of the profile is aligned with a first axis of a coordinate system. The profile is then manipulated to align a second feature of the profile with a second axis of the coordinate system.11-13-2008
20100235956ATOMIC FORCE MICROSCOPY TRUE SHAPE MEASUREMENT METHOD - An atomic force microscopy (AFM) method includes a scanning probe that scans a surface of a structure to produce a first structure image. The structure is then rotated by 90° with respect to the scanning probe. The scanning probe scans the surface of the structure again to produce a second structure image. The first and second structure images are combined to produce best fit image of the surface area of the structure. The same method is used to produce the best fit image of a flat standard. The best fit image of the flat standard is subtracted from the best fit image of the structure to obtain a true topographical image in which Z direction run out error is substantially reduced or eliminated.09-16-2010
20110138505SCANNING PROBE MICROSCOPY EMPLOYING CORRELATION PATTERN RECOGNITION - An apparatus and associated method for topographically characterizing a workpiece. A scanning probe obtains topographical data from the workpiece. A processor controls the scanning probe to scan a reference surface of the workpiece to derive a first digital file and to scan a surface of interest that includes at least a portion of the reference surface to derive a second digital file. Correlation pattern recognition logic integrates the first and second digital files together to align the reference surface with the surface of interest.06-09-2011

Patent applications by Huiwen Liu, Eden Prairie, MN US

Jie J. Liu, Woodbury, MN US

Patent application numberDescriptionPublished
20100197027AN INDICATING FIBER - A fiber, an articles formed from a fiber and methods of making the fiber and associate article are disclosed. In one embodiment, the fiber comprises a synthetic polymer and a color-changing indicator. The color-changing indicator is dispersed throughout the synthetic polymer. The color-changing indicator reacts in the presence of a stimulus to produce a color change.08-05-2010

Patent applications by Jie J. Liu, Woodbury, MN US

Jiyan Liu, Maplewood, MN US

Patent application numberDescriptionPublished
20090312740Balloon Inflation Device - One embodiment provides a method implemented by a powered inflation device to prepare a balloon catheter for use during a medical procedure. In this embodiment, the method includes drawing an amount of medical fluid from a fluid reservoir into the inflation device during a first motorized operation of the inflation device, removing an amount of air from the balloon catheter during a second motorized operation of the inflation device, and injecting the amount of medical fluid from the inflation device into the balloon catheter during a third motorized operation of the inflation device to inflate a balloon located at a distal end of the balloon catheter The powered inflation device may be a stand-alone device in one embodiment. In one embodiment, the powered inflation device is coupled to an angiographic injector system. When it is coupled to an angiographic injector system, the balloon inflation device and the injector system may be controlled by a common control panel, or console, in one embodiment.12-17-2009
20100249587ANGIOGRAPHIC INJECTOR AND INJECTION METHOD - An angiographic injector system includes a manifold and valve which selectively connects either a syringe pump or a low pressure system to a catheter which is inserted into a patient. The valve is normally biased to a state which connects the low pressure system to the catheter for pressure monitoring, saline flushing, or aspirating functions. When an injection is to be made, the valve automatically switches so that the low pressure system is disconnected and not exposed to high pressure, while the syringe pump is connected through the manifold to the catheter.09-30-2010

Patent applications by Jiyan Liu, Maplewood, MN US

Jiyan Liu, Roseville, MN US

Patent application numberDescriptionPublished
20100204574SYSTEM AND METHOD FOR MULTIPLE INJECTION PROCEDURES ON HEART VESSELS - An angiographic injector system and a method of controllably delivering medical fluid to a patient from an angiographic injector system are disclosed. A multiple processor control system is used to actively control the injection process and to monitor sensed functions of the system. The multiple processors provide dual redundancy safety circuits for critical control functions such as syringe motor drive speed and current. A motor/servo-amplifier nested control function is also disclosed. A unique method and apparatus are disclosed for establishing injection parameter default values just prior to an injection procedure that are based on physiological values of the patient to be treated. The injector system uses an interactive display panel that presents sequenced set-up screens to the user and which enables the user to select injection procedures, parameters and other modes of operation directly through the interactive panel.08-12-2010

Patent applications by Jiyan Liu, Roseville, MN US

Junkang J. Liu, Woodbury, MN US

Patent application numberDescriptionPublished
20090251917ILLUMINATION DEVICE - The present invention is generally directed to illumination devices, and particularly directed to illumination devices which utilize thin light sources or edge-lit sources in combination with a light turning plate. The illumination devices may be used in a broad range of applications, and are particularly suited for the interior lighting of vehicles.10-08-2009
20110206923ELECTRON BEAM CURED SILICONE MATERIALS - Methods of preparing silicone materials using electron beam curing are described. The materials are hot melt processed and cured in the absence of an effective amount of catalysts and initiators. Both functional and nonfunctionalized silicone materials may be used. Exemplary cured materials include silicone pressure sensitive adhesives, silicone foams, and non-tacky silicon films.08-25-2011
20110206924ELECTRON BEAM CURED, NONFUNCTIONALIZED SILICONE PRESSURE SENSITIVE ADHESIVES - Methods of preparing silicone pressure sensitive adhesives are described. The methods include electron beam curing nonfunctionalized silicone materials, e.g., silicone fluids and gums. Hot melt processing the nonfunctionalized silicone materials prior to electron beam crosslinking, and crosslinked adhesives prepared by such methods are also described. Adhesives prepared by hot melt coating and electron beam curing nonfunctionalized silicone materials and adhesive articles incorporating such adhesives are also disclosed.08-25-2011
20110212325GENTLE TO SKIN ADHESIVE - Electron beam and gamma radiation crosslinked, silicone gel adhesives are described. Both nonfunctional and functional poly diorganosiloxanes are used. Methods of forming the adhesives, and medical articles incorporating such adhesives are also described.09-01-2011
20110303120ELECTRON BEAM CURED SILICONE RELEASE MATERIALS - Methods of electron beam curing nonfunctional polysiloxanes and silanol terminated polysiloxanes are described. The resulting release materials are also described.12-15-2011

Patent applications by Junkang J. Liu, Woodbury, MN US

Lan H. Liu, Rosemount, MN US

Patent application numberDescriptionPublished
20080241733RADIATION CURABLE THERMAL TRANSFER ELEMENTS - Radiation curable thermal transfer elements including a substrate and a light-to-heat conversion layer overlaying the substrate, and processes to make the thermal transfer elements. The light-to-heat conversion layer is derived from a radiation curable material capable of being cured by exposure to radiation at a curing wavelength and an imaging radiation absorber material not substantially increasing radiation absorbance at the curing wavelength. The radiation curable transfer elements can be used in processes for making organic microelectronic devices.10-02-2008
20080274352OPTICAL FILM COMPRISING ANTISTATIC PRIMER AND ANTISTATIC COMPOSITIONS - Optical films are described that comprise an antistatic primer disposed on the substrate and a high refractive index layer disposed on the primer. The primer comprises a sulfopolymer and at least one antistatic agent. The high refractive index layer comprises surface modified inorganic nanoparticles dispersed in a crosslinked organic material. The antistatic agent is preferably selected from conductive inorganic particles, conductive polymer, and mixtures thereof. Also describes are antistatic compositions and surface treated conductive inorganic oxide particles.11-06-2008
20100003501FLEXIBLE HIGH REFRACTIVE INDEX HARDCOAT - Antireflective films comprising a flexible high refractive index layer that comprises at least 60 wt-% of inorganic nanoparticles, the nanoparticles having a refractive index of at least 1.60, dispersed in a crosslinked organic material. Also described are surface treated nanoparticles.01-07-2010
20100171929DRY ERASABLE PROJECTION ARTICLE AND SYSTEM - A communication article and system comprising a writing member having a dry erasable front surface and a projection member is disclosed. The projection member includes an asymmetric optical diffuser that scatters light in a first direction with a first viewing angle A07-08-2010
20100173093FLUORO(METH)ACRYLATE POLYMER COMPOSITION SUITABLE FOR LOW INDEX LAYER OF ANTIREFLECTIVE FILM - Antireflective film articles and low refractive index coating compositions are described that comprises a fluorinated free-radically polymerizable polymeric (e.g. intermediate) material. The free-radically polymerizable fluorinated polymeric intermediate comprises the reaction product of i) at least one multi-functional free-radically polymerizable material having a fluorine content of at least 25 wt-%, and ii) optionally other multi-functional free-radically polymerizable material. The total amount of multi-functional materials is preferably at least about 25 wt-%.07-08-2010
20100232021DURABLE ANTIREFLECTIVE FILM - Antireflective films are described having a surface layer comprising a the reaction product of a polymerizable low refractive index composition comprising at least one fluorinated free-radically polymerizable material and surface modified inorganic nanoparticles. A high refractive index layer is coupled to the low refractive index layer. In one embodiment, the high refractive index layer comprises surface modified inorganic nanoparticles dispersed in a crosslinked organic material. The antireflective film is preferably durable, exhibiting a haze of less than 1.0% after 25 wipes with steel wool using a 3.2 cm mandrel and a mass of 1000 grams.09-16-2010

Patent applications by Lan H. Liu, Rosemount, MN US

Michael S. Liu, Bloomington, MN US

Patent application numberDescriptionPublished
20090065866Non-Planar Silicon-On-Insulator Device that Includes an "Area-Efficient" Body Tie - Non-planar SOI devices that include an “area-efficient” body tie are disclosed. The device includes a bulk substrate, an insulator layer formed on a surface of the bulk substrate, and a silicon body formed on a surface of the insulator layer. The silicon body preferably includes (i) a non-planar channel connecting a source region and a drain region, and (ii) a body tie that is adjacent to the channel and couples the channel to a voltage potential. The device further includes a gate dielectric formed on the channel and a gate material formed on the gate dielectric.03-12-2009

Patent applications by Michael S. Liu, Bloomington, MN US

Richard Y. Liu, Woodbury, MN US

Patent application numberDescriptionPublished
20100221511MULTILAYER FILMS INCLUDING THERMOPLASTIC SILICONE BLOCK COPOLYMERS - A multilayer film includes a first layer of a first polymeric material and a second layer of a second polymeric material. The first material has a first index of refraction and the second material has a second index of refraction less than the first index of refraction. In one embodiment, the second material includes a polydiorganosiloxane polyamide block copolymer. In another embodiment, the second material includes a polydiorganosiloxane polyoxamide block copolymer.09-02-2010

Timothy M. Liu, St. Paul, MN US

Patent application numberDescriptionPublished
20110068067MERCHANDISE HANGER AND METHOD OF USE - A merchandise hanger includes a base section, a living hinge, and a hooked section. The base section defines a front surface and a rear surface opposite the front surface and includes features configured to facilitate coupling the base section to the product assembly. The living hinge extends from the base section. The hooked section extends from the living hinge. The base section includes one of at least one male coupling structure and at least one female coupling structure. The hooked section includes the other of the at least one male coupling structure and the at least one female coupling structure. The merchandise hanger folds about the living hinge in a manner mating the at least one male coupling structure and the at least one female coupling structure to maintain the merchandise hanger in a folded position. Other hangers, products, assemblies and associated methods are also disclosed.03-24-2011

Wanzhan Liu, Shoreview, MN US

Patent application numberDescriptionPublished
20120035697SHIELDED IMPLANTABLE MEDICAL LEAD WITH GUARDED TERMINATION - Implantable medical leads include a shield that is guarded at a termination by having a first portion and second portion of the shield, where the first portion is between a termination of the shield at the second portion and an inner insulation layer surrounding the filars. The first portion may reduce the coupling of RF energy from the termination of the shield at the second portion to the filars. The first and second portions may be part of a continuous shield, where the first and second portions are separated by an inversion of the shield. The first and second portions may instead be separate pieces. The first portion may be noninverted residing between the termination at the second portion and inner layers, or the first portion may be inverted to create first and second sub-portions. The shield termination at the second portion is between the first and second sub-portions.02-09-2012

Xianghong Liu, Eagan, MN US

Patent application numberDescriptionPublished
20100079306TRAFFIC FLOW MONITORING FOR INTERSECTIONS WITH SIGNAL CONTROLS - A method and system are provided for determining travel time through intersections by assigning an initial position for a virtual probe in the intersection and updating the position and velocity for the virtual probe such that the position and velocity of the virtual probe are determined multiple times from a time when the virtual probe is at an initial position until the time when the updated position of the virtual probe is past a stop line at the intersection. Updating the position and velocity of the virtual probe involves retrieving vehicle detection data and traffic control signal data to determine a distance from the virtual probe to the closer of a stop line and a vehicle in a queue in front of the virtual probe. The length of the queue is determined using the intersection of two shockwaves.04-01-2010

Yaoqi Liu, Shoreview, MN US

Patent application numberDescriptionPublished
20090218707METHOD FOR MAKING PEN/PMMA MULTILAYER OPTICAL FILMS - Methods and apparatuses are provided for the manufacture of coextruded polymeric multilayer optical films. The multilayer optical films have an ordered arrangement of layers of two or more materials having particular layer thicknesses and a prescribed layer thickness gradient throughout the multilayer optical stack. The methods and apparatuses described allow improved control over individual layer thicknesses, layer thickness gradients, indices of refraction, interlayer adhesion, and surface characteristics of the optical films. The methods and apparatuses described are useful for making interference polarizers, mirrors, and colored films that are optically effective over diverse portions of the ultraviolet, visible, and infrared spectra.09-03-2009

Patent applications by Yaoqi Liu, Shoreview, MN US

Yao Qi Liu, Shoreview, MN US

Patent application numberDescriptionPublished
20090323180MULTILAYER OPTICAL FILMS HAVING ONE OR MORE REFLECTION BANDS - Multilayer optical films having one or more reflection bands are provided. The films include alternating polymeric layers configured to selectively reflect and transmit visible light at a design angle of incidence, where the selective reflection includes first and second visible reflection bands. At least one of the first and second visible reflection bands is a first-order reflection.12-31-2009

Yaoqi J. Liu, Maplewood, MN US

Patent application numberDescriptionPublished
20080282542FLEXIBLE HEAT SINK - A method of making a flexible heat sink is provided. The method includes the steps of (i) providing a first polymer composition having a multiplicity of thermally conductive particles; (ii) providing a second polymer composition having a multiplicity of non-spherical thermally conductive particles; (iii) forming a heat sink base from the first and/or second polymer; and (iv) forming a multiplicity of elongated protrusions contiguous with the heat sink base from the second polymer and optionally also from the first polymer11-20-2008

Patent applications by Yaoqi J. Liu, Maplewood, MN US

Yufeng Liu, Woodbury, MN US

Patent application numberDescriptionPublished
20090262348METHOD OF MODIFYING LIGHT WITH SILICONE (METH)ACRYLATE COPOLYMERS - A method of modifying light is disclosed and includes: providing an optical element having an oriented polymer network of a silicone (meth)acrylate copolymer and exhibiting a first phase and a second phase, the first phase and the second phase being chemically connected and having different refractive indices, the first phase being continuous, and the second phase comprising a plurality of structures dispersed within the first phase; illuminating the optical element with light from a light source; and detecting polarized or directionally diffused light transmitted by the optical element. Optical elements including the polymer network and a variety of additional layers are also disclosed, as are optical devices such as prisms, display panels, lenses, and the like.10-22-2009
20100124667ISOTROPIC LAYER OF MULTILAYER OPTICAL FILM COMPRISING BIREFRINGENT THERMOPLASTIC POLYMER - Multilayer optical films are described comprising at least one first optical layer comprising a birefringent thermoplastic polymer having an in-plane birefringence of at least 0.15 at 632.8 nm; and at least one second optical layer having an in-plane birefringence of less than 0.040 at 632.8 nm. The second optical layer comprises a copolymerized blend of at least one birefringent thermoplastic polymer and at least one second thermoplastic polymer.05-20-2010
20100171929DRY ERASABLE PROJECTION ARTICLE AND SYSTEM - A communication article and system comprising a writing member having a dry erasable front surface and a projection member is disclosed. The projection member includes an asymmetric optical diffuser that scatters light in a first direction with a first viewing angle A07-08-2010
20100201242LIGHT CONTROL FILM AND MULTI-LAYER OPTICAL FILM STACK - Film stacks and displays incorporating the same are described.08-12-2010
20100277668OPTICAL FILM LAMINATES - Optical film laminates of birefringent polyester films and adhesive are disclosed. The laminates have a thickness of at least 10 mils (0.25 mm). The laminates of the invention are useful in displays having a diagonal of 37 in (94 cm) or greater.11-04-2010
20110051040THICK POLYESTER FILMS FOR OPTICAL ARTICLES AND OPTICAL ARTICLES - In one embodiment, the invention provides a polyethylene terephthalate film comprising a biaxially oriented and birefringent film polyethylene terephthalate film having at least one layer having a thickness of from 10 mils (0.25 mm) to 25 mils (0.64 mm), wherein the film is formed from a polyethylene terephthalate resin comprising the reaction product of dimethyl terephthalate, terephthalic acid, or a combination thereof ethylene glycol, a diol or triol monomer other than ethylene glycol and from 0.9 to 3 mol percent of a sulfonate monomer having an inorganic counterion based on 100 mol percent dimethyl terephthalate, terephthalic acid, or a combination thereof.03-03-2011
20110109966Multilayer Optical Film Layer Comprising Blend of Methyl Methacrylate Polymer and Styrene Acrylonitrile Polymer - Presently described are multilayer optical films comprising an optical stack comprising at least one first birefringent optical layer; at least one (e.g. isotropic) second optical layer having a birefringence of less than 0.04 at 633 nm, and optionally at least one skin layer. The second layer, skin layer, or a combination thereof comprises a blend of at least one methyl methacrylate polymer and at least one styrene-acrylonitrile polymer.05-12-2011
20110116012PASSIVE DAYLIGHT-COUPLED BACKLIGHT WITH TURNING FILM HAVING PRISMS WITH CHAOS FOR SUNLIGHT VIEWABLE DISPLAYS - A passive daylight-coupled display having an LCD panel, a diffuser, a turning film behind the LCD panel, and a curved reflector behind the turning film. For passive backlighting, the diffuser transmits daylight to the reflector, which reflects the daylight to the LCD panel through the turning film and provides for substantially uniform distribution of the daylight on the LCD panel for backlighting it. The turning film has prisms with chaos for an improved viewer experience.05-19-2011
20110207087PREFORMED MALLEABLE DENTAL ARTICLES AND METHODS - Protected hardenable dental article comprising a hardenable dental article comprising a base and at least one outer surface extending from the base, wherein at least the base and the at least one outer surface of the hardenable dental article comprise a hardenable dental material; and a multi-layer polymeric film in contact with at least a portion of the at least one outer surface; wherein the multi-layer polymeric film comprises at least two dissimilar polymers in separate layers; kits including the protected hardenable dental article; and methods of making hardenable dental articles are disclosed.08-25-2011
20110222263HIGH TRANSMISSION FLUX LEVELING MULTILAYER OPTICAL FILM AND RELATED CONSTRUCTIONS - A reflective film includes microlayers arranged into optical repeat units, each optical repeat unit including a negatively birefringent microlayer. The microlayers are tailored to provide the film with on-axis polarizing properties, such that normally incident light polarized along a block axis is substantially reflected and normally incident light polarized along a pass axis is substantially transmitted. On-axis transmission for the block axis may be <20%, and on-axis transmission for the pass axis may be >70%. The microlayers also provide the film with angularly dependent polarizing properties: p-polarized light incident in a block plane of incidence is substantially reflected at near-normal angles but substantially transmitted at an oblique angle. The film transmits unpolarized light incident in this plane more strongly at the oblique angle than at normal. The films can be used in direct-lit backlights, luminaires, and similar lighting systems for flux leveling to promote spatial brightness uniformity.09-15-2011
20110261436METHOD OF MODIFYING LIGHT WITH SILICONE (METH) ACRYLATE COPOLYMERS - A method of modifying light is disclosed and includes: providing an optical element having an oriented polymer network of a silicone (meth)acrylate copolymer and exhibiting a first phase and a second phase, the first phase and the second phase being chemically connected and having different refractive indices, the first phase being continuous, and the second phase comprising a plurality of structures dispersed within the first phase; illuminating the optical element with light from a light source; and detecting polarized or directionally diffused light transmitted by the optical element. Optical elements including the polymer network and a variety of additional layers are also disclosed, as are optical devices such as prisms, display panels, lenses, and the like.10-27-2011
20120013851FRONT PROJECTION SCREEN WITH HIGH CONTRAST - A light diffusing optical construction is disclosed. The optical construction includes an asymmetric optical diffuser that scatters light in a first direction with a first viewing angle A01-19-2012

Patent applications by Yufeng Liu, Woodbury, MN US

Yufeng R. Liu, Woodbury, MN US

Patent application numberDescriptionPublished
20090155458METHOD FOR MANUFACTURING ON A FILM SUBSTRATE AT A TEMPERATURE ABOVE ITS GLASS TRANSITION - A method for preparing a flexible film substrate with a low glass transition temperature can be used in the production of an article that retains dimensions and improves the surface smoothness after high temperature processing. The invention, for example, would enable low temperature films such as PET and PEN to be dimensionally stable and ultra flat at conditions commonly used in electronic processing which can typically exceed 200° C. More specifically, the methods enable the use of e.g. barrier films based on PET or PEN in OLED/PLED manufacturing.06-18-2009
20110268939OPTICAL FILM COMPRISING BIREFRINGENT NAPHTHALATE COPOLYESTER HAVING BRANCHED OR CYCLIC C4-C10 ALKYL UNITS - The present invention relates to multilayer optical films and birefringent copolyester films. The birefringent copolyester optical layer or birefringent copolyester film comprises a major amount of naphthalate units, ethylene units, and a minor amount of branched or cyclic C4 to C10 alkyl units. Also described are certain copolyester polymeric materials further comprising subunits of a phthalate ionomer such as dimethyl sulfosodium isophthtalate ionomer.11-03-2011

Yunxing Liu, Maplewood, MN US

Patent application numberDescriptionPublished
20110071390ROTARY MEDICAL MANIFOLD - A rotary medical manifold, for delivering various fluids through a patient delivery mechanism is described. The rotary manifold can include a manifold body and a valve stem. The manifold body can include a central cavity, an output port, a first fluid port, and a second fluid port. The valve stem can include an injector port, and a single central fluid passage. The valve stem can be adapted to slibably engage the central cavity of the manifold body and provide selective fluidic connectivity between the injector port and the output port, the first fluid port and the second fluid port.03-24-2011
20110071393LOCKING SYRINGE WITH INTEGRATED BIAS MEMBER - A locking syringe with an integrated bias member, for delivering medical fluids at high pressure, can include a housing, a shaft, a piston, a cap assembly, a bias member, and a locking member. A distal end of the housing can interface with a patient delivery apparatus. The housing includes an internal cavity into which a distal end of the shaft can be inserted. The piston can be connected to the distal end of the shaft and can include a peripheral sealing surface that can slidably engage the inside surface of the housing to form a movable seal. The cap assembly at the proximal end of the housing can engage the shaft. A base cap can secure the piston within the housing. The bias member can have a distal end coupled to the piston and a proximal end restrained, such as to help pressurize the internal cavity. The user-actuatable locking member can user-selectively engage and inhibit unwanted movement of the shaft.03-24-2011