Patent application number | Description | Published |
20080291442 | Chemical and biological sensing using metallic particles in amplifying and absorbing media - A film for surface enhanced raman scattering may be utilized for chemical and biological sensing. The film includes a polymeric layer, and a metallic nanoparticle having a cross-section, the metallic nanoparticle being embedded in the polymeric layer. The polymeric layer has a thickness less than a largest straight line through the cross-section of said metallic nanoparticle. The polymeric layer is selected from a group of absorbing media and amplifying media, and the metallic nanoparticle may be gold. The metallic nanoparticle may also be a shape selected from a group of spheroids and rods. | 11-27-2008 |
20090039644 | Systems and methods for using microscopic capsules containing orientable materials for document security and processing applications - Systems and methods for using microscopic capsules containing orientable materials for document security and processing applications are presented. A security application comprising a medium having a substrate and a plurality of microcapsules is disclosed. The microcapsules contain magnetically orientable material and a liquid. The magnetically orientable material is oriented in a first alignment. Application of a magnetic field to the medium orients the magnetically orientable material to a second alignment, thereby altering the opacity of the medium. Magnetic material may also be dragged into a concentrated arrangement by a magnetic field, thereby altering the opacity of the medium. | 02-12-2009 |
20090045617 | Near infrared ink security feature - Systems and methods of providing a covert security marking for items such as documents, packaging, credit cards, and other valuable goods to combat the steady increase in forgery, counterfeiting, and other fraudulent activities is presented. A spectrally narrow, near infrared ink system serves as the basis of a covert security feature for items of value. Alternatively, or in combination, metal oxides having a substantially narrow absorption band and a maximum absorption wavelength of electromagnetic radiation in the near infrared range are also utilized. | 02-19-2009 |
20100006656 | Magnetically Addressable Bistable Film - A magnetically addressable bistable film includes a polymeric substrate impregnated with polymeric microcapsules that contain liquid-suspended magnetically orientable or magnetophoretic material. The material is subject to reorientation either in the plane or perpendicular to the plane of the film, as well to forces of attraction, due to an external magnetic field. The two states provide sufficient difference in light reflectivity to create visible contrast by addressing the film locally, either on a pixel-by-pixel basis or by spatially patterning the driving magnetic field itself. The congregation of magnetophoretic materials in one portion of the microcapsule may also provide sufficient difference in light reflectivity to create visible contrast. | 01-14-2010 |
20100103504 | NANO-ANTENNA ENHANCED IR UP-CONVERSION MATERIALS - Robust composite materials containing nanoscale antennae for molecules are used in the up-conversion process. Antennae can be used to locally enhance the electric fields near an upconverting phosphor or material to enhance both absorption of energy, such as with a television or radio receiver, and emission of energy, such as by the transmitter at the radio station. | 04-29-2010 |
20100132790 | Rechargeable Dye Sensitized Solar Cell - A method of using a dye sensitized solar cell includes providing a dye sensitized solar cell having a first electrode having a transparent substrate of a first refractive index, a second electrode having a second transparent substrate of a second refractive index comparable to the first refractive index, and an electrolyte solution in a gap between the first electrode and second electrode. The electrolyte solution is removed from the gap and replaced with an inert fluid having a third refractive index comparable to the first refractive index and the second refractive index to allow light to pass through the cell substantially unrefracted. Alternatively, the inert fluid is in the gap between the first electrode and second electrode, and the inert fluid is removed from the gap and replaced with an electrolyte solution. | 06-03-2010 |
20100140501 | FLUORESCENCE NOTCH CODING AND AUTHENTICATION - Systems and methods for document and product authentication using a variety of absorption and emission signatures are disclosed. Emission signatures in the form of florescent or phosphorescent coatings, inks and substrates are used for authentication and protection of items such as documents, currency, and secondary packaging for tobacco, luxury goods and pharmaceuticals. Spectrally overlapping absorption and emission materials are combined to provide a unique spectral fingerprint detectable by a scanner. | 06-10-2010 |
20100303188 | Interactions of Charged Particles on Surfaces for Fusion and Other Applications - A method of generating a chemical and nuclear reactions includes providing a surface formed between a first medium and a second medium, the first medium having a first dielectric constant, ∈, and the second medium having a second dielectric constant, ∈ | 12-02-2010 |
20100310900 | ULTRAVIOLET-DULL RESPONSE IN SECURITY TAGGANTS - Articles and methods for manufacturing security articles include ultraviolet absorptive materials disposed above and below an emissive security taggant that prevent excitation of the taggant itself at certain shorter ultraviolet wavelengths, rendering the article secure from detection by normal or conventional means. | 12-09-2010 |
20110199222 | Gas Activated Changes to Light Absorption and Emission Characteristics for Security Articles - Disclosed are security articles and methods and systems for authenticating security articles using a plurality of stimuli. According to one embodiment, an illustrative security feature includes activation of phosphorescent or fluorescent materials by the simultaneous presence of a source of electromagnetic radiation and a specific gas environment. A detector detects a spectral emission of the security feature that results from the change in gas environment. The spectral emission may be compared to an expected emissive signature to determine authenticity of the security article. | 08-18-2011 |
20120069945 | INTERACTIONS OF CHARGED PARTICLES ON SURFACES FOR FUSION AND OTHER APPLICATIONS - A method of generating an energy release reaction including providing a surface or interface formed between a first medium and a second medium. Depositing a plurality of like-charged particles in the first medium adjacent to the surface wherein a potential binding energy between the plurality of like-charged particles and the repulsive force that exists between the like charged particles causes the particles to move until a state of equilibrium is reached. Wherein the movement of the particles over said surface generates dissipation energy. Further wherein the state of equilibrium results in a distance between at least two of the like-charged particles to be sufficiently small to result in reaction of the at least two like-charged particles. | 03-22-2012 |
20120140791 | Currency Fitness and Wear Detection Using Temperature Modulated Infrared Detection - In part, the invention relates to methods, systems, and devices that use thermal transients to diagnose wear or other damage in a document such as a banknote. In one embodiment, the invention performs various steps including applying a transient heating or cooling stimulus to the document, wherein the document includes a substrate and a plurality of elements thermally dissimilar to the substrate; detecting a differential thermal emission signature for the substrate and each thermally dissimilar element using a sensor; and determining a wear status of the document based on the detected differential thermal emission signatures. | 06-07-2012 |
20130082108 | Methods and Systems for Authenticating and Tracking Objects - In part, the invention relates to a security feature for authenticating an object having an outer surface and an inner surface. The security feature includes a substrate having a length and a width and a two-dimensional code comprising a plurality of two dimensional regions, the plurality of two dimensional regions disposed in the substrate, the two-dimensional code is substantially invisible when inspected during exposure to visible light and readable during exposure to ultraviolet light. | 04-04-2013 |
20130084249 | AUTHENTICATABLE COATINGS FOR PHARMACEUTICAL TABLETS AND INGESTIBLE MATERIALS - An authenticable and machine readable coating for pills, tablets and other ingestible materials is provided. The disclosure also relates to methods of authenticating the same. The coatings are formed from a lattice of particles stacked to cause selective diffraction such that each pill or tablet has an optical signature. The signature associated with each coating can be read and authenticated. In one embodiment, the particles are substantially spherical and self-organized. In one embodiment, generally recognized as safe (GRAS) materials are used to form the particles. | 04-04-2013 |
20140116474 | SUPERCRITICAL FLUID CLEANING OF BANKNOTES AND SECURE DOCUMENTS - A method and system for cleaning a secure instrument, such as a banknote, including a substrate, visual data and a security feature, including exposing the secure instrument to a supercritical fluid at a temperature and a pressure and for a duration sufficient to clean the substrate and not compromise the security feature and the visual data, wherein to clean the substrate includes to remove one or more substances from the substrate into the supercritical fluid. The substances removed from the substrate may include contaminants, dirt, sebum and pathogens. | 05-01-2014 |