| Patent application number | Description | Published |
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| 20090131656 | METHODS OF NANOASSEMBLY OF A FRACTAL POLYMER AND MATERIALS FORMED THEREBY - The invention relates to the formation of synthesized fractal constructs and the methods of chemical self-assembly for the preparation of a non-dendritic, nano-scale, fractal constructs or molecules. More particularly, the invention relates to fractal constructs formed by molecular self-assembly, to create synthetic, nanometer-scale fractal shapes. In an embodiment, a nanoscale Sierpinski hexagonal gasket is formed. This non-dendritic, perfectly self-similar fractal macromolecule is comprised of bisterpyridine building blocks that are bound together by coordination to 36 Ru and 6 Fe ions to form a nearly planar array of increasingly larger hexagons around a hollow center. | 05-21-2009 |
| 20090171088 | REVERSIBLE SELF-ASSEMBLY OF IMBEDDED METALLOMACROCYCLES WITHIN A MACROMOLECULAR SUPERSTRUCTURE - In accordance with the present invention, there is provided a method for preparing a reversible, self-assembly of an imbedded hexameric metallomacrocycle within a macromolecular superstructure. The method occurs by an intramolecular mechanism in which a macromolecular skeleton possesses multiple ligands capable of reversible assembly-disassembly triggered by the presence of metal ions. | 07-02-2009 |
| 20100001235 | CONSTRUCTION OF QUANTUM DOTS VIA A REGIOSELECTIVE DENDRITIC FUNTIONALIZED CELLULOSE TEMPLATE - The invention is directed to quantum dot nanoparticles and methods of preparation. Using regioselective dendritic functionalized cellulose, quantum dots may be embedded in the modified cellulosic material. The quantum dot nanoparticles provide use for biotechnology or biomedicinal applications. Photooptical properties and morphology for use in as well as its biocompatibility were investigated. | 01-07-2010 |
| 20100013382 | METHODS FOR PRODUCING MATERIALS WITH PHOTO AND ELECTROLUMINESCENCE PROPERTIES AND SYSTEMS USING SUCH MATERIALS. - The invention is directed to a method of preparing polymeric metallomacrocycles having measurable photo- and electroluminescence properties and devices using such materials. In an embodiment an O-hexyl-3,5-bis(terpyridine)phenol ligand has been synthesized and transformed into a hexagonal Zn(II)-metallomacrocycle by a facile self-assembly procedure capitalizing on terpyridine-Zn(II)-terpyridine connectivity. The material is usable in an OLED device based on the photo- and electro-luminescence characteristics thereof. | 01-21-2010 |
| 20100041859 | CONVENIENT SYNTHESIS OF 1 --> 3 C-BRANCHED DENDRONS - In accordance with the present invention, there is provided a method of preparing higher generation 1→3 C-branched polyamide dendrons. The combination of commercially available acryloyl chloride with 1→3 C-branched amines, e.g., di-tert-butyl 4-[2-(tert-butoxycarbonyl)ethyl]-4-aminoheptanedioate, resulted in generally high yields of acryl amides, which upon treatment with other reagents, generated the desired higher generation dendrons. These second and third generation dendrons were fully characterized and compared to the samples prepared from a convergent synthesis. | 02-18-2010 |
| 20100133471 | DENDRON-TETHERED AND TEMPLATED QUANTUM DOTS ON CARBON NANOTUBES - The present invention provides an example for the construction of stable quantum dots, such as CdS quantum dots, on the surface of carbon nanotubes (CNTs) templated and stabilized, such as by attached 1→3 C-branched amide-based dendrons. The construction and method of preparation is applicable to both single- and multi-walled carbon nanotubes, other types of appropriately modified polymeric and oligomeric materials, along with the use of many other types of dendrons, and other materials capable of forming quantum dots. | 06-03-2010 |
| 20100286395 | METAL-MEDIATED REVERSIBLE SELF-ASSEMBLY OF CARBON NANOTUBES - There is provided a method and nanocomposite for the reversible assembly of nanotubes, such as oxidized single wall carbon nanotubes, based on metal coordination. The method produces a thermally stable, neutral nanocomposite possessing enhanced mechanical, electrical, physical and chemical properties for example. Disassembly can be provided by treatment with a competing ligand compound. | 11-11-2010 |
| Patent application number | Description | Published |
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| 20080214107 | Upstream Broad Beam Diversity - A satellite communication system is provided according to one embodiment of the invention. The satellite communication system includes a gateway with first and second antennas. The first antenna receives a signal from a first satellite that includes at least a first signal from a first user. The second antenna receives a second signal from a second satellite, that includes at least a second primary signal from a second user and a version of the first signal. The gateway may include circuitry to isolate the first signal from the second signal. The gateway may also include a combiner configured to combine the first signal from the first satellite and the first signal isolated from the second signal. Various other embodiments are disclosed that isolate a secondary signal received from a satellite and combine the secondary signal with the same signal received from other antennas at the gateway. | 09-04-2008 |
| 20080261522 | Multi-Antenna Satellite System With Wireless Interface To Vehicle - A wireless satellite communication device is provided according to one embodiment of the invention. The wireless satellite communication device may include one or more satellite antennas, one or more local antennas and circuitry. A satellite antenna may be configured to communicate with one or more satellites. The local antenna may be configured to communicate with one or more wireless user devices within the vicinity of the wireless satellite communication device. The local antennas may include a local antenna. The circuitry may be coupled with the satellite antenna and the local antenna and may be configured to receive data from the satellite antenna and transmit the data with the local antenna. The wireless satellite communication device may also include a solar panel configured to provide electrical power to at least the satellite antenna, the local antenna, and the circuitry. | 10-23-2008 |
| 20090161732 | METHOD AND APPARATUS FOR MULTIPLE ACCESS OVER A COMMUNICATION CHANNEL - A communication technique based on direct sequence spread spectrum signaling employs, for all users sharing an access channel, a single spreading code that has a duration sufficiently longer than the symbol length that the likelihood of confusion between users is minimized if not eliminated. The length of the spreading code is sufficiently long that contention events can occur only when two bursts occur at the receiver within one chip time of one another. | 06-25-2009 |
| 20100008225 | SYSTEM FOR CHANNEL CONGESTION MANAGEMENT - A system for managing data traffic in a multi-user multiple-simultaneous-access (MUMSA) environment, for example in a code reuse multiple access (CRMA) environment or other physical environment having true random access with more than one transmission present at the same time, the system including a channel load estimator for multiple users, a congestion threshold calculator using the estimate of channel load to calculate threshold on an ongoing basis, a tester at each terminal performing an experiment using that congestion threshold value and a random number generator to determine if a packet is eligible to be transmitted, a traffic controller for transferring downstream virtual channel traffic and a redistributing mechanism for redistributing user terminals to affiliate with the proper downstream virtual channel. | 01-14-2010 |
| 20110143656 | MULTI-BAND SATELLITE COMMUNICATION FADE MITIGATION - One or more satellites may generate multiple beams. The beams may facilitate communication over multiple communication frequency bands including a relatively high capacity frequency band and a relatively fade-resilient frequency band. The beams may overlap. User terminals and/or gateways in a beam intersection may select from among the multiple communication frequency bands to communication with the satellite(s). Responsive to detection of rain fade, some of the user terminals and/or gateways may be instructed to use the relatively fade-resilient frequency band. The multiple communication frequency bands may be assigned to the user terminals and/or gateways so as to maximize total system capacity. | 06-16-2011 |
| 20110268158 | FLEXIBLE CAPACITY SATELLITE COMMUNICATIONS SYSTEM WITH FLEXIBLE ALLOCATION BETWEEN FORWARD AND RETURN CAPACITY - Systems and methods for supporting more flexible coverage areas and spatial capacity assignments using satellite communications systems are disclosed. Antenna elements are arranged in one or more phased arrays. The phased arrays may be used to receive uplink communications, transmit downlink communications, or both receive uplink communications and transmit downlink communications. Beam forming networks (BFN's) associated with the one or more phased arrays may be dynamic, allowing for movement of the locations of the receive beams, the transmit beams, or both the receive beams and transmit beams. The beams may then “hop” from location to location according to a predefined or dynamic hopping pattern. In some embodiments, the hopping patterns may be time-varying and may be changed or updated on-the-fly. | 11-03-2011 |
