Patents Assigned to Princeton University
  • Patent number: 7901795
    Abstract: Organic light emitting devices are disclosed which are comprised of a heterostructure for producing electroluminescence wherein the heterostructure is comprised of an emissive layer containing a phosphorescent dopant compound.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: March 8, 2011
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Mark E. Thompson, Yujian You, Andrei Shoustikov, Scott Sibley, Paul E. Burrows, Stephen R. Forrest
  • Publication number: 20110052476
    Abstract: A modified graphite oxide material contains a thermally exfoliated graphite oxide with a surface area of from about 300 m2/g to 2600 m2/g, wherein the thermally exfoliated graphite oxide displays no signature of the original graphite and/or graphite oxide, as determined by X-ray diffraction.
    Type: Application
    Filed: June 1, 2010
    Publication date: March 3, 2011
    Applicant: The Trustees of Princeton University
    Inventors: Robert K. PRUD'HOMME, Ilhan A. Aksay, Ahmed Abdala
  • Publication number: 20110049437
    Abstract: Coatings comprising functionalized graphene sheets and at least one binder. In one embodiment, the coatings are electrically conductive.
    Type: Application
    Filed: January 9, 2009
    Publication date: March 3, 2011
    Applicant: The Trustees of Princeton University
    Inventors: John M. Crain, John S. Lettow, Ilhan A. Aksay, Robert K. Prud'Homme, Sibel Korkut
  • Patent number: 7897210
    Abstract: A device and a method for facilitating the deposition and patterning of organic materials onto substrates utilizing the vapor transport mechanisms of organic vapor phase deposition is provided. The device includes one or more nozzles, and an apparatus integrally connected to the one or more nozzles, wherein the apparatus includes one or more source cells, a carrier gas inlet, a carrier gas outlet, and a first valve capable of controlling the flow of a carrier gas through the one or more source cells. The method includes moving a substrate relative to an apparatus, and controlling the composition of the organic material and/or the rate of the organic material ejected by the one or more nozzles while moving the substrate relative to the apparatus, such that a patterned organic layer is deposited over the substrate.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: March 1, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Max Shtein, Stephen R. Forrest, Jay B. Benzinger
  • Patent number: 7897429
    Abstract: A photosensitive optoelectronic device having an improved hybrid planar bulk heterojunction includes a plurality of photoconductive materials disposed between the anode and the cathode. The photoconductive materials include a first continuous layer of donor material and a second continuous layer of acceptor material. A first network of donor material or materials extends from the first continuous layer toward the second continuous layer, providing continuous pathways for conduction of holes to the first continuous layer. A second network of acceptor material or materials extends from the second continuous layer toward the first continuous layer, providing continuous pathways for conduction of electrons to the second continuous layer. The first network and the second network are interlaced with each other. At least one other photoconductive material is interspersed between the interlaced networks.
    Type: Grant
    Filed: November 20, 2006
    Date of Patent: March 1, 2011
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Stephen R. Forrest, Fan Yang
  • Publication number: 20110045196
    Abstract: A method of depositing organic material is provided. A carrier gas carrying organic material is ejected from a nozzle at a flow velocity that is at least 10% of the thermal velocity of the carrier gas, such that the organic material is deposited onto a substrate. In some embodiments, the dynamic pressure in a region between the nozzle and the substrate surrounding the carrier gas is at least 1 Torr, and more preferably 10 Torr, during the ejection. In some embodiments, a guard flow is provided around the carrier gas.
    Type: Application
    Filed: June 25, 2010
    Publication date: February 24, 2011
    Applicant: The Trustees of Princeton University
    Inventors: Stephen R. Forrest, Max Shtein
  • Patent number: 7893352
    Abstract: An organic photosensitive optoelectronic device, having an anode, a cathode, and an organic blocking layer between the anode and the cathode is described, wherein the blocking layer comprises a phenanthroline derivative, and at least partially blocks at least one of excitons, electrons, and holes.
    Type: Grant
    Filed: November 22, 2005
    Date of Patent: February 22, 2011
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Mark E. Thompson, Jian Li, Stephen Forrest, Barry Rand
  • Patent number: 7889774
    Abstract: The present invention relates to organic lasers. More specifically, the present invention is directed to an organic laser that provides a self-stimulated source of coherent radiation originating from organic microcavity polaritons. The organic polariton laser of the present invention comprises a substrate, a resonant microcavity comprising an organic polariton emission layer; and an optical pump. In preferred embodiments the optical pump is a microcavity OLED allowing for the fabrication of a self-contained or integrated device.
    Type: Grant
    Filed: June 25, 2004
    Date of Patent: February 15, 2011
    Assignee: The Trustees of Princeton University
    Inventors: Stephen R. Forrest, Russell Holmes
  • Patent number: 7883787
    Abstract: Organic light emitting devices are described wherein the emissive layer comprises a host material containing an emissive molecule, which molecule is adapted to luminesce when a voltage is applied across the heterostructure, and the emissive molecule is selected from the group of phosphorescent organometallic complexes, including cyclometallated platinum, iridium and osmium complexes. The organic light emitting devices optionally contain an exciton blocking layer. Furthermore, improved electroluminescent efficiency in organic light emitting devices is obtained with an emitter layer comprising organometallic complexes of transition metals of formula L2MX, wherein L and X are distinct bidentate ligands. Compounds of this formula can be synthesized more facilely than in previous approaches and synthetic options allow insertion of fluorescent molecules into a phosphorescent complex, ligands to fine tune the color of emission, and ligands to trap carriers.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: February 8, 2011
    Assignees: The Trustees of Princeton University, The University of Southern California
    Inventors: Mark E. Thompson, Peter Djurovich, Sergey Lamansky, Drew Murphy, Raymond Kwong, Feras Abdel-Razzaq, Stephen R. Forrest, Marc A. Baldo, Paul E. Burrows
  • Publication number: 20110027481
    Abstract: A device and a method for facilitating the deposition and patterning of organic materials onto substrates utilizing the vapor transport mechanisms of organic vapor phase deposition is provided. The device includes one or more nozzles, and an apparatus integrally connected to the one or more nozzles, wherein the apparatus includes one or more source cells, a carrier gas inlet, a carrier gas outlet, and a first valve capable of controlling the flow of a carrier gas through the one or more source cells. The method includes moving a substrate relative to an apparatus, and controlling the composition of the organic material and/or the rate of the organic material ejected by the one or more nozzles while moving the substrate relative to the apparatus, such that a patterned organic layer is deposited over the substrate.
    Type: Application
    Filed: May 25, 2010
    Publication date: February 3, 2011
    Applicant: The Trustees of Princeton University
    Inventors: Max Shtein, Stephen R. Forrest, Jay B. Benzinger
  • Patent number: 7879401
    Abstract: Methods and systems for organic vapor jet deposition are provided, where an exhaust is disposed between adjacent nozzles. One or more carrier gases may be provided and ejected from a plurality of nozzles. An exhaust may be provided to create a localized vacuum between nozzles. The exhaust may reduce pressure buildup in the nozzles and between the nozzles and the substrate, leading to improved deposition profiles, resolution, and improved nozzle-to-nozzle uniformity. The exhaust may be in fluid communication with an ambient vacuum, or may be directly connected to a vacuum source.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: February 1, 2011
    Assignees: The Regents of the University of Michigan, The Trustees of Princeton University
    Inventors: Stephen Forrest, Richard Lunt
  • Patent number: 7877340
    Abstract: A system for identifying radionuclide emissions is described. The system includes at least one processor for processing output signals from a radionuclide detecting device, at least one training algorithm run by the at least one processor for analyzing data derived from at least one set of known sample data from the output signals, at least one classification algorithm derived from the training algorithm for classifying unknown sample data, wherein the at least one training algorithm analyzes the at least one sample data set to derive at least one rule used by said classification algorithm for identifying at least one radionuclide emission detected by the detecting device.
    Type: Grant
    Filed: April 16, 2010
    Date of Patent: January 25, 2011
    Assignee: Princeton University
    Inventors: Charles A. Gentile, Jason Perry, Stephen W. Langish, Kenneth Silber, William M. Davis, Dana Mastrovito
  • Patent number: 7826693
    Abstract: A reconfigurable optical add-drop multiplexer comprises a first waveguide layer having formed therein a first multiplexer-demultiplexer, a second multiplexer-demultiplexer, and a plurality of optical switches. The reconfigurable optical add-drop multiplexer further comprises a second waveguide layer optically coupled to the first waveguide and having a second effective index of refraction, said second waveguide layer having an optical amplifier formed therein. An input signal is amplified by the optical amplifier and communicated to the first optical multiplexer-demultiplexer where the signal is demultiplexed into a plurality individual wavelength signals. The second optical multiplexer-demultiplexer is adapted to receive a multiplexed add signal and to demultiplex the add signal into component wavelength signals. The individual wavelength signals are received at the optical switches and selectively routed to either an optical detector or toward the first multiplexer-demultiplexer.
    Type: Grant
    Filed: October 26, 2007
    Date of Patent: November 2, 2010
    Assignee: The Trustees of Princeton University
    Inventors: Shashank S. Agashe, Kuen-Ting R. Shiu, Stephen R. Forrest
  • Patent number: 7825736
    Abstract: The present invention relates to a method and system to suppress or eliminate light shift in an optical pumping system, such as an atomic clock. The method uses modulation of a radiation source, such as a radio frequency or microwave source, to simultaneously lock the frequency of the radiation source to an atomic resonance and lock the frequency of the optical pumping source in order to suppress or eliminate light shift. In one embodiment, the method of the present invention directly utilizes the out-of-phase channel of a lock-in amplifier to additionally lock an optical pumping source to a zero-light-shift frequency, where the in-phase channel is used to lock the frequency of the radiation source to an atomic resonance.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: November 2, 2010
    Assignee: Princeton University
    Inventors: Bart H. McGuyer, Yuan-Yu Jau, William Happer
  • Patent number: 7816715
    Abstract: A device is provided having a first electrode, a second electrode, a first photoactive region having a characteristic absorption wavelength ?1 and a second photoactive region having a characteristic absorption wavelength ?2. The photoactive regions are disposed between the first and second electrodes, and further positioned on the same side of a reflective layer, such that the first photoactive region is closer to the reflective layer than the second photoactive region. The materials comprising the photoactive regions may be selected such that ?1 is at least about 10% different from ?2. The device may further comprise an exciton blocking layer disposed adjacent to and in direct contact with the organic acceptor material of each photoactive region, wherein the LUMO of each exciton blocking layer other than that closest to the cathode is not more than about 0.3 eV greater than the LUMO of the acceptor material.
    Type: Grant
    Filed: March 26, 2007
    Date of Patent: October 19, 2010
    Assignee: The Trustees of Princeton University
    Inventors: Stephen Forrest, Jiangeng Xue, Soichi Uchida, Barry P. Rand
  • Patent number: 7815963
    Abstract: The present invention provides a dense-coverage, adherent phosphorous-based coating on the native oxide surface of a material. Disclosed phosphorous-based coatings include phosphate and organo-phosphonate coatings. The present invention also provides further derivatization of the phosphorous-based coatings to yield dense surface coverage of chemically reactive coatings and osteoblast adhesion-promoting and proliferation-promoting coatings on the native oxide surface of a titanium material.
    Type: Grant
    Filed: May 5, 2008
    Date of Patent: October 19, 2010
    Assignee: The Trustees of Princeton University
    Inventors: Jeffrey Schwartz, Michael J. Avaltroni, Kim S. Midwood, Jean E. Schwarzbauer, Ellen Gawalt
  • Patent number: 7794965
    Abstract: The invention relates to methylated proteins that control protein phosphorylation, particularly phosphoesterases, such as PP2A. It relates to screening methods for determining agents that affect methylation of these proteins and thus also modulate the level of phosphorylation of phosphoproteins. It relates as well to the agents and to compositions comprising the agents. In a particular aspect in this regard the invention relates to agents that alter PP2A methylation and that thereby affect phosphorylation of phosphoproteins that play an important role in health or disease, such as the tau protein which is implicated in the etiology of Alzheimer's Disease. The invention further relates to diagnostic methods based on protein methylation levels, to compositions comprising agents for affecting methylation of proteins and for controlling the phosphate complement of phosphoproteins.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: September 14, 2010
    Assignees: Signum Biosciences, Inc., The Trustees of Princeton University
    Inventors: Gregory Stock, Jeffry B. Stock, Maxwell Stock, Scott Vafai
  • Patent number: 7796607
    Abstract: Example scalable multi-protocol label switching (MPLS) based virtual private networks (VPNs) and methods to implement the same are disclosed. A disclosed example spoke provider edge (PE) router for an MPLS-based VPN includes a truncated virtual routing and forwarding (VRF) table containing a first value referencing a hub PE router and a second value referencing a first customer edge (CE) router coupled to the VPN via the PE router, and a forwarding module to forward a packet received from the first CE router to the hub PE router when the packet contains an address referencing a second CE router coupled to the VPN via a second spoke PE router.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: September 14, 2010
    Assignees: AT&T Intellectual Property I, L.P., Trustees of Princeton University
    Inventors: Alexandre Gerber, Subhabrata Sen, Carsten Lund, Dan Pei, MohammadTaghi Hajiaghayi, Changhoon Kim
  • Patent number: 7772383
    Abstract: A composition for performing a polynucleotide amplification reaction at low temperature, including a polynucleotide amplification reaction mixture into which is incorporated a sufficiently high concentration of a low molecular weight compound selected from the group consisting of amides, sulfones, sulfoxides and diols, to accomplish the amplification at the low temperature. In another embodiment, a composition for enhancing a polynucleotide amplification reaction, including a polynucleotide amplification reaction mixture into which is incorporated a low molecular weight diol in an amount effective to enhance the polynucleotide amplification.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: August 10, 2010
    Assignee: The Trustees of Princeton University
    Inventors: Raj Chakrabarti, Clarence Schutt
  • Patent number: 7771824
    Abstract: Bridged graphite oxide material comprising graphite sheets bridged by at least one diamine bridging group. The bridged graphite oxide material may be incorporated in polymer composites or used in adsorption media.
    Type: Grant
    Filed: September 4, 2008
    Date of Patent: August 10, 2010
    Assignee: The Trustees of Princeton University
    Inventors: Margarita Herrera-Alonso, Michael J. McAllister, Ilhan A. Aksay, Robert K. Prud'homme