Patents by Inventor David J. Irvin

David J. Irvin has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7402679
    Abstract: A process for making energetic urethane cured binders by making poly-tetrazoles to produce multi-functional tetrazole polyols for producing tetrazole base polymers. Embodiments of the present invention relate generally to a process for preparation of a monomer including reacting an effective amount of nitrile(s) with inorganic azide and a divalent zinc salt in a first solvent, cooling to room temperature producing poly tetrazole purifying the poly tetrazole by recrystallization or precipitation in a second solvent, and reacting an effective amount of the purified poly-tetrazole with a third solvent, a soluble reversible or non-reversible base, and 2-chloro-ethanol, cooling to room temperature producing tetrazole polyol. Embodiments of the present invention further include the monomers produced by the processes described herein.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: July 22, 2008
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: David J. Irvin, Mark H. Mason, Stephen Fallis, Andrew Chafin, Richard Hollins
  • Patent number: 7399433
    Abstract: The present invention demonstrates the synthesis by electropolymerization of a new stable n-doping conjugated polymer poly(3,4-difluorothiophene) that may easily be electrochemically characterized.
    Type: Grant
    Filed: November 27, 2006
    Date of Patent: July 15, 2008
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: David J. Irvin, David L. Witker, John D. Stenger-Smith, Jennifer A. Irvin
  • Patent number: 7396938
    Abstract: A process for making energetic cured binders by making poly-tetrazoles to produce multi-functional tetrazole polyols for producing tetrazole base polymers. Embodiments of the present invention relate generally to a process for preparation of a monomer including reacting an effective amount of nitrile(s) with inorganic azide and a divalent zinc salt in a first solvent, cooling to room temperature producing poly tetrazole, purifying the poly tetrazole by precipitation in a second solvent, and reacting an effective amount of the purified poly tetrazole with a third solvent, a soluble reversible or non-reversible base, and 2-chloro-ethanol, cooling to room temperature producing tetrazole polyol.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: July 8, 2008
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: David J. Irvin, Mark H. Mason, Stephen Fallis, Andrew Chafin
  • Patent number: 7351448
    Abstract: An apparatus and process for coating surfaces of metal or metallic components including providing at least one metal having a patterned outer surface exhibiting an optical reflection greater than about 40%, providing at least one anti-reflective coating material, the anti-reflective coating material(s) including effective amount of electrically conductive light scattering and/or wavelength absorbent properties, and depositing the anti-reflective coating material(s) onto the patterned outer surface(s) of each metal, wherein the anti-reflective coating material(s) conforms to the desired patterned outer surface(s) of each metal. In another embodiment, a coated metal component includes at least one metal having a patterned outer surface(s); and, a coating of at least one antireflective material deposited on the metal patterned outer surface by deposition, wherein the antireflective coating material(s) including effective amount of electrically conductive light scattering and/or wavelength absorbent properties.
    Type: Grant
    Filed: July 27, 2004
    Date of Patent: April 1, 2008
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: David J. Irvin, Andrew Guenthner, Nicholas Prokopuk
  • Patent number: 7119028
    Abstract: A film surface imprinted with nanometer-sized particles to produce micro- and/or nano-structured electron and hole collecting interfaces, including: at least one substrate; at least one photoabsorbing conjugated polymer (including polybutylthiophene (pbT)) applied on a substrate, nanometer-sized particles including multiwalled carbon nanotubes (MWNT) to produce a charge separation interface; at least one transparent polymerizable layer, wherein the MWNT are embedded in the conjugated polymer to produce mixture and applied on a substrate to form a MWNT bearing surface film layer to form a stamp surface which is imprinted into the surface of the polymerizable film layer to produce micro- and/or nano-structured electron and hole collecting interfaces; polymerizing the polymerizable film layer to form a conformal gap between the MWNT stamp surface and the surface of the polymerizable film layer, and filling the gap with a photoabsorbing material to promote the generation of photoexcited electrons and transport to
    Type: Grant
    Filed: October 29, 2003
    Date of Patent: October 10, 2006
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: M. Joseph Roberts, Scott K. Johnson, Richard A. Hollins, Curtis E. Johnson, Thomas J. Groshens, David J. Irvin
  • Patent number: 6685442
    Abstract: A valve actuator based on a conductive polymer gel is disclosed. A nonconductive housing is provided having two separate chambers separated by a porous frit. The conductive polymer is held in one chamber and an electrolyte solution, used as a source of charged ions, is held in the second chamber. The ends of the housing a sealed with a flexible elastomer. The polymer gel is further provide with electrodes with which to apply an electrical potential across the gel in order to initiate an oxidation reaction which in turn drives anions across the porous frit and into the polymer gel, swelling the volume of the gel and simultaneously contracting the volume of the electrolyte solution. Because the two end chambers are sealed the flexible elastomer expands or contracts with the chamber volume change. By manipulating the potential across the gel the motion of the elastomer can be controlled to act as a “gate” to open or close a fluid channel and thereby control flow through that channel.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: February 3, 2004
    Assignee: Sandia National Laboratories
    Inventors: Douglas A. Chinn, David J. Irvin
  • Publication number: 20030156953
    Abstract: A valve actuator based on a conductive polymer gel is disclosed. A nonconductive housing is provided having two separate chambers separated by a porous frit. The conductive polymer is held in one chamber and an electrolyte solution, used as a source of charged ions, is held in the second chamber. The ends of the housing a sealed with a flexible elastomer. The polymer gel is further provide with electrodes with which to apply an electrical potential across the gel in order to initiate an oxidation reaction which in turn drives anions across the porous frit and into the polymer gel, swelling the volume of the gel and simultaneously contracting the volume of the electrolyte solution. Because the two end chambers are sealed the flexible elastomer expands or contracts with the chamber volume change. By manipulating the potential across the gel the motion of the elastomer can be controlled to act as a “gate” to open or close a fluid channel and thereby control flow through that channel.
    Type: Application
    Filed: February 20, 2002
    Publication date: August 21, 2003
    Inventors: Douglas A. Chinn, David J. Irvin
  • Patent number: 6407143
    Abstract: A method and composition for removing perchlorate from a highly selective ion exchange resin is disclosed. The disclosed approach comprises treating the resin in a solution of super critical or liquid carbon dioxide and one or more quaternary ammonium chloride surfactant compounds.
    Type: Grant
    Filed: December 22, 1999
    Date of Patent: June 18, 2002
    Assignee: Sandia Corporation
    Inventors: William R. Even, David J. Irvin, Jennifer A. Irvin, Edward E. Tarver, Gilbert M. Brown, James C. F. Wang