Patents Represented by Attorney A. David Spevack
  • Patent number: 8159738
    Abstract: A large-aperture direct-view high-speed electro-optic shutter includes an electro-optic polymer material constructed to form a Pockels cell and an integrated photoconducting semiconductor switch. A chromophore-doped polymer material or chromophore copolymer, wherein the chromophore is oriented within the polymer material, exhibits a linear electro-optic effect when an electric field is applied to the device. In one embodiment, the polymer host material comprises one or more of a polycarbonate, amorphous polycarbonate, or polymethylmethacrylate polymer hosts. The optically active chromophore comprising one or more coumarin and coumarin derivatives, stilbene or tolane derivatives is incorporated within the polymer host, forming a guest-host polymer. In another embodiment, the chromophore is chemically bonded to the monomer that forms the polymer, resulting in an optically active copolymer.
    Type: Grant
    Filed: June 16, 2010
    Date of Patent: April 17, 2012
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Robert C. Hoffman, Timothy Pritchett
  • Patent number: 8148020
    Abstract: A metal-air battery has an anode in which the electrochemically active material is molybdenum. The molybdenum may be in the form of a bulk body of material or it may comprise a particulate material dispersed with or in another material. In some instances, the molybdenum may comprise a member of an alloy or mixture. Also disclosed is a modular battery system which may include the molybdenum-based anode material.
    Type: Grant
    Filed: April 1, 2009
    Date of Patent: April 3, 2012
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Rongzhong Jiang, Charles W. Walker, Jr., Judy Walker, legal representative, Deryn Chu
  • Patent number: 8053027
    Abstract: A compositionally stratified multi-layer Ba1-xSrxTiO3 (BST) heterostructure material is described which includes a lower layer of crystallized Ba1-xSrxTiO3 perovskite oxide where x is in the range of 0.36-0.44, inclusive, deposited on a substrate; an intermediate layer of crystallized Ba1-xSrxTiO3 perovskite oxide where x is in the range of 0.23-0.27, inclusive, in contact with the lower layer; and an upper layer of crystallized Ba1-xSrxTiO3 perovskite oxide where x in the range of 0.08-0.13, inclusive, in contact with the intermediate layer. A phase shifter and/or preselector tunable device including a compositionally stratified multi-layer BST heterostructure material is described according to the present invention. Temperature sensitivity of an inventive phase shifter is reduced by at least 70% in the temperature interval of 20 to 90° C., inclusive, and by at least 14% in the temperature interval of ?10 to 20° C., inclusive, compared to a compositionally homogeneous 60/40 BST material.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: November 8, 2011
    Assignee: The United States of America as represented bt the Secretary of the Army
    Inventor: Melanie Will Cole
  • Patent number: 8027273
    Abstract: A method and apparatus for creating virtual topologies for a mobile ad hoc network comprising generating at least two nodes representing transmitters and/or receivers in the network; each of said at least two nodes having parameters (which may be for example, location, direction, velocity, receiving/transmitting capability); generating a bidirectional or unidirectional link between two nodes when appropriate; storing the specifications of the topology of the network in memory; whereby the stored topologies are adapted to be inputted into a test-bed system capable of emulating a mobile ad-hoc network. Optionally, the images of the nodes and links are displayed on a display and/or may be stored on a programmable storage medium.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: September 27, 2011
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Binh Quang Nguyen
  • Patent number: 8026017
    Abstract: An electrolyte membrane assembly for use in a fuel cell or other electrochemical device includes an ion exchange membrane, a base electrolyte reservoir configured and operable to maintain a volume of a basic electrolyte solution in contact with at least some of the first face of the membrane, and an acid electrolyte reservoir configured and operable to maintain a volume of an acidic electrolyte in contact with at least a portion of the second face of the membrane. The membrane may be a cation exchange membrane or an anion exchange membrane. Also disclosed are fuel cells which incorporate the electrolyte membrane assembly.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: September 27, 2011
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Rongzhong Jiang, Charles Rong, Deryn Chu
  • Patent number: 7964741
    Abstract: Compounds containing bibenzochalcogenophene structures are provided in which the chalcogenide is sulfur, selenium, or tellurium. The compounds are characterized by planarity, rigid conjugation structure and high charge mobility making them useful as organic semiconductor in optical devices, electronic devices and integrated devices like organic field effect transistors (OFET) for thin film transistor liquid crystal display (LCD), electrophoretic display such as electronic paper, organic light emitting diode (OLED) for flat panel displays, organic radio frequency identification (ORFID) tags, organic photovoltaic (OPV), sensor devices, and analog and digital electronics.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: June 21, 2011
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Jianmin Shi, Eric W. Forsythe, David C. Morton
  • Patent number: 7944121
    Abstract: Co-fabricating of vertical piezoelectric MEMS actuators that achieve large positive and negative displacements through operating electric fields in excess of the coercive field includes forming a large negative displacement vertical piezoelectric MEMS actuator, forming a bottom structural dielectric layer above a substrate layer; forming a bottom electrode layer above the structural dielectric layer; forming an active piezoelectric layer above the bottom electrode layer; forming a top electrode layer above the active piezoelectric layer; forming a top structural layer above the top electrode layer, wherein the x-y neutral plane of the negative displacement vertical piezoelectric MEMS actuator is above the mid-plane of the active piezoelectric layer, wherein the negative displacement vertical piezoelectric MEMS actuator is partially released from the substrate to allow free motion of the actuator; and combining the large negative displacement vertical piezoelectric MEMS actuator and a large positive displaceme
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: May 17, 2011
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Jeffrey Spencer Pulskamp, Ronald G. Polcawich
  • Patent number: 7876901
    Abstract: An alternative design is given for an optimized quantum cryptographic entangling probe for attacking the BB84 protocol of quantum key distribution. The initial state of the probe has a simpler analytical dependence on the set error rate to be induced by the probe than in the earlier design. The new device yields maximum information to the probe for a full range of induced error rates. As in the earlier design, the probe contains a single CNOT gate which produces the optimum entanglement between the BB84 signal states and the correlated probe states.
    Type: Grant
    Filed: March 29, 2007
    Date of Patent: January 25, 2011
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Howard E. Brandt
  • Patent number: 7876026
    Abstract: A piezoelectric microelectromechanical systems (MEMS) actuator includes a silicon substrate; an actuator beam comprising a first end region connected to the silicon substrate and a second end region connected to a mechanically compliant spring assembly; a first electrode over the silicon substrate; a piezoelectric layer above the first electrode; a second electrode over the piezoelectric layer; a conductive top structural layer above the second electrode, wherein a center half of the actuator beam is configured as a positive deflection region, and wherein both the first electrode and the second electrode supply voltage to both positive and negative deflection regions of the actuator beam.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: January 25, 2011
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Jeffrey Spencer Pulskamp, Ronald G. Polcawich
  • Patent number: 7824802
    Abstract: A method of preparing a composite cathode active material having superior cell characteristics includes mixing and milling starting material, carbon and an organic complexing agent. The mixture is heated at a first temperature in an inert atmosphere to form a composite precursor, and then the precursor is ground and heated at a second temperature in an inert atmosphere to produce a carbon-containing composite cathode material having high electronic conductivity. The said composite cathode has a general formula of LiFe1?xMxPO4—C, within 0?x<1, M is selected from the group consisting of Co, Ni, V, Cr, Mn and a mixture thereof.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: November 2, 2010
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Shengshui Zhang, Kang Xu, T. Richard Jow
  • Patent number: 7692592
    Abstract: A patch array antenna is disclosed. The patch array antenna includes a ground plane with two patches. Each patch is supported from the ground plane only by metal posts. The patch array antenna further includes two-pin-feed probes, each pin-feed probe coupled to one patch, and a two-way high power divider attached to both pin-feed probes.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: April 6, 2010
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Canh Ly, Steven J. Weiss, Arthur C. Harrison
  • Patent number: 7573564
    Abstract: Ladar systems are provided. An exemplary ladar system includes a waveform generator for generating an arbitrary waveform, a laser for transmitting a modulated light signal toward a target, and a Doppler tracking loop for tracking the Doppler frequency shift between the transmitted light signal and a received reflected light signal.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: August 11, 2009
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: William Charles Ruff, Brian C. Redman, Barry Lee Stann
  • Patent number: 7570347
    Abstract: An imaging method and apparatus using an unmodulated pulsed laser with a chirp modulated receiver is provided for producing 3D plus intensity imagery of targets in heavily cluttered locations The apparatus includes a laser for emitting a laser beam and synchronizing a receiver to receive a reflected laser signal and transform the reflected laser signal into a displayable image that includes intensity information.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: August 4, 2009
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: William Charles Ruff, Barry L. Stann
  • Patent number: 7201879
    Abstract: An aerosol-into-liquid collector (ALC) for collecting gas-borne particles from a large volume of gas such as air into a small volume of liquid is described. The ALC uses a linear quadrupole to concentrate particles flowing in a gas and to help direct these concentrated particles toward a small volume of collection liquid so that these particles tend to combine with a small volume of collection liquid that can then be drawn from the ACL for further analysis. The particles in the gas are typically given a charge that is opposite to that of the charge imparted to the volume of collection liquid so that electrostatic forces help draw particles from the flowing gas into the small volume of liquid. The linear quadrupole focuses toward it axis particles that have the charge, mass and mobility to be stable in the linear quadrupole.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: April 10, 2007
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Steven Clyde Hill, Horn-Bond Lin
  • Patent number: 7201878
    Abstract: Aerosol particle analyzer (APA) for measuring an analyte in airborne particle is described. Airborne particles are first given an electrical charge and then drawn in air past an oppositely charged volume of an analysis liquid that exposed to the air at a small hole in a container, such as a capillary, that holds that analysis liquid. Electrostatic forces enhance the rate that the airborne particles collide with the small exposed volume of the analysis liquid in the hole. If the particles that collide with the analysis liquid contain the analyte, an optical property of the analysis liquid, such as the fluorescence, varies according to the amount of the analyte in the particles. This optical property is measured and the amount of analyte in the particles is determined from the measured optical property.
    Type: Grant
    Filed: March 26, 2004
    Date of Patent: April 10, 2007
    Assignee: The United States of America as Represented by the Secretary of the Army
    Inventors: Horn-Bond Lin, Steven Clyde Hill
  • Patent number: 7153475
    Abstract: Aerosol particle analyzer (APA) for measuring the amount of analyte in airborne particle is described. The APA uses an analysis liquid. In most embodiments, this analysis liquid is chosen so that when it is mixed with the particles, an optical property of the analysis liquid (AL) varies according to the amount of the analyte in the particles. Airborne particles are drawn into the instrument, and detected using optical methods such as light scattering or laser-induced fluorescence. When a particle of interest is detected, a charged droplet of the analysis liquid (CDAL) is ejected so that it collides with the detected particle and moves into a horizontally oriented linear quadrupole that is in an airtight container, except for small orifices to let the CDAL enter and exit.
    Type: Grant
    Filed: May 9, 2005
    Date of Patent: December 26, 2006
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Steven Clyde Hill, Richard Kounai Chang, Jean-Pierre Wolf
  • Patent number: 7135243
    Abstract: An organic EL device, comprising an anode and a cathode, and at least one organic luminescent layer comprising a compound of the formula: positioned between said anode and said cathode, and wherein: R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11 and R12 are individual substituents, each substituent is an individual group selected from the group consisting of hydrogen, halogens, and groups that contain 1 to 48 carbon atoms, and at least one group is not hydrogen.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: November 14, 2006
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Jianmin Shi, Eric Forsythe, David Claude Morton
  • Patent number: 7125518
    Abstract: Aerosol particle analyzer (APA) for measuring the amount of analyte in airborne particle is described. The APA uses an analysis liquid. When this analysis liquid is mixed with the particles, an optical property of the analysis liquid (CDAL) varies according to the amount of the analyte in the particles. A charged droplet of the analysis liquid is levitated. Airborne particles are drawn into the instrument and given a charge that is opposite that of the CDAL, and made to flow near the CDAL so that electrostatic forces greatly increase the probability that the CDAL and charged particles will combine. Then the CDAL is ejected into a horizontally oriented linear quadrupole that is in an airtight container, except for a small orifice to let the CDAL enter. The CDAL is levitated in a high humidity environment so that it evaporates slowly, so that there is time for the reaction between the analyte, if any, and the CDAL can take place, and so that the optical property, typically fluorescence, can be measured.
    Type: Grant
    Filed: February 14, 2004
    Date of Patent: October 24, 2006
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Steven Clyde Hill
  • Patent number: 7126687
    Abstract: Characterizing individual airborne particles in real time according to their absorption of optical energy at one or more wavelengths. The instrument can measure the two-dimensional angular optical scattering (TAOS) and/or the one-dimensional angular optical scattering (ODAOS) at one or more wavelengths. When two wavelengths are used, one is chosen to be on an absorption peak, the other is off of the absorption peak (preferably in the absorption valley).
    Type: Grant
    Filed: June 19, 2003
    Date of Patent: October 24, 2006
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Steven Clyde Hill, Ronald Gene Pinnick, Yong-Le Pan, Kevin Bruce Aptowicz, Kristan P. Gurton, Richard Kounai Chang
  • Patent number: 6805957
    Abstract: A disruptive camouflage pattern system to be used for both military and civilian applications. The system includes specialized techniques for printing the camouflage pattern system unto fabric. The system provides camouflage in both the human visible light and the near infrared range. The system depends on macro pattern resulting from a repeat of a micro pattern. The coloring used includes at least four colorings from dyes that in combination produce a percent reflectance value comparable to that of the negative space of the camouflaged subject's surroundings. The system functions by a macro pattern being disruptive of the subject's shape and a micro pattern having sharp edge units of a size capable of blending the subject into its background. The relative lightness values and percentages of total pattern, wet or dry, are sufficient to produce a percent reflectance of acceptable colors, in terms of lightness values unlike current four-color camouflage.
    Type: Grant
    Filed: November 7, 2001
    Date of Patent: October 19, 2004
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Luisa DeMorais Santos, Deirdre E. Townes, Gabriel R. Patricio, Carole Ann Winterhalter, Anabela Dugas, Timothy R. O'Neill, Rosemary Ann Lomba, Barbara J. Quinn