Patents by Inventor Gilbert M. Brown

Gilbert M. Brown 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: 7090757
    Abstract: A method and apparatus for separating molecules. The apparatus includes a substrate having a surface. A film in contact with the surface defines a substrate/film interface. An electrode electrically connected to the film applies a voltage potential between the electrode and the substrate to form a depletion region in the substrate at the substrate/film interface. A photon energy source having an energy level greater than the potential is directed at the depletion region to form electron-hole pairs in the depletion region. At least one of the electron-hole pairs is separated by the potential into an independent electron and an independent hole having opposite charges and move in opposing directions. One of the electron and hole reach the substrate/film interface to create a photopotential in the film causing charged molecules in the film to move in response to the localized photovoltage.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: August 15, 2006
    Assignee: UT-Battelle LLC
    Inventors: Thomas G. Thundat, Thomas L. Ferrell, Gilbert M. Brown
  • Patent number: 6800203
    Abstract: A method is described to decompose perchlorate in a FeCl3/HCl aqueous solution such as would be used to regenerate an anion exchange resin used to remove perchlorate. The solution is mixed with a reducing agent, preferably an organic alcohol and/or ferrous chloride, and can be heated to accelerate the decomposition of perchlorate. Lower temperatures may be employed if a catalyst is added.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: October 5, 2004
    Assignee: U.T. Battelle
    Inventors: Baohua Gu, David R. Cole, Gilbert M. Brown
  • Publication number: 20030232426
    Abstract: A method, system, and apparatus are provided for separating molecules, such as biomolecules. The method, system, and apparatus utilize an electrochemical cell having at least to electrodes, one electrode comprising a photo-sensitive material capable of generating a photopotential. Molecules are moved through an electrolyte medium between the at least two electrodes based upon localized photopotentials.
    Type: Application
    Filed: February 12, 2003
    Publication date: December 18, 2003
    Inventors: Thomas G. Thundat, Thomas L. Ferrell, Gilbert M. Brown
  • Publication number: 20030222031
    Abstract: A method is described to decompose perchlorate in a FeCl3/HCl aqueous solution such as would be used to regenerate an anion exchange resin used to remove perchlorate. The solution is mixed with a reducing agent, preferably an organic alcohol and/or ferrous chloride, and can be heated to accelerate the decomposition of perchlorate. Lower temperatures may be employed if a catalyst is added.
    Type: Application
    Filed: May 29, 2002
    Publication date: December 4, 2003
    Inventors: Baohua Gu, David R. Cole, Gilbert M. Brown
  • Publication number: 20030157698
    Abstract: A method and apparatus for separating molecules. The apparatus includes a substrate having a surface. A film in contact with the surface defines a substrate/film interface. An electrode electrically connected to the film applies a voltage potential between the electrode and the substrate to form a depletion region in the substrate at the substrate/film interface. A photon energy source having an energy level greater than the potential is directed at the depletion region to form electron-hole pairs in the depletion region. At least one of the electron-hole pairs is separated by the potential into an independent electron and an independent hole having opposite charges and move in opposing directions. One of the electron and hole reach the substrate/film interface to create a photopotential in the film causing charged molecules in the film to move in response to the localized photovoltage.
    Type: Application
    Filed: February 15, 2002
    Publication date: August 21, 2003
    Inventors: Thomas G. Thundat, Thomas L. Ferrell, Gilbert M. Brown
  • Patent number: 6544442
    Abstract: Disclosed is a composition of matter comprising a tributyl phosphate complex of a group 3, lanthanide, actinide, or group 13 salt in an organic carrier and a method of making the complex. These materials are suitable for use in solid or liquid organic scintillators, as in x-ray absorption standards, x-ray fluorescence standards, and neutron detector calibration standards.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: April 8, 2003
    Assignee: UT-Battelle, LLC
    Inventors: Zane W. Bell, Chuen Huei-Ho, Gilbert M. Brown, Charles Hurlbut
  • Publication number: 20020132866
    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: Application
    Filed: January 14, 2002
    Publication date: September 19, 2002
    Inventors: William R. Even, Jennifer A. Irvin, Edward E. Tarver, Gilbert M. Brown, James C. F. Wang
  • Patent number: 6448299
    Abstract: A method for regenerating strong-base anion exchange resins utilizing a sequential chemical displacement technique with new regenerant formulation. The new first regenerant solution is composed of a mixture of ferric chloride, a water-miscible organic solvent, hydrochloric acid, and water in which tetrachloroferrate anion is formed and used to displace the target anions on the resin. The second regenerant is composed of a dilute hydrochloric acid and is used to decompose tetrachloroferrate and elute ferric ions, thereby regenerating the resin. Alternative chemical displacement methods include: (1) displacement of target anions with fluoroborate followed by nitrate or salicylate and (2) displacement of target anions with salicylate followed by dilute hydrochloric acid. The methodology offers an improved regeneration efficiency, recovery, and waste minimization over the conventional displacement technique using sodium chloride (or a brine) or alkali metal hydroxide.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: September 10, 2002
    Assignee: U.T. Battelle, LLC
    Inventors: Gilbert M. Brown, Baohua Gu, Bruce A. Moyer, Peter V. Bonnesen
  • 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
  • Patent number: 6358396
    Abstract: Anion exchange resins sorbed with perchlorate may be regenerated by a combination of chemical reduction of perchlorate to chloride using a reducing agent and an electrochemical reduction of the oxidized reducing agent. Transitional metals including Ti, Re, and V are preferred chemical reagents for the reduction of perchlorate to chloride. Complexing agents such as oxalate are used to prevent the precipitation of the oxidized Ti(IV) species, and ethyl alcohol may be added to accelerate the reduction kinetics of perchlorate. The regeneration may be performed by continuously recycling the regenerating solution through the resin bed and an electrochemical cell so that the secondary waste generation is minimized.
    Type: Grant
    Filed: May 8, 2000
    Date of Patent: March 19, 2002
    Assignee: U. T. Battelle, LLC
    Inventors: Baohua Gu, Gilbert M. Brown
  • Patent number: 6059975
    Abstract: Disclosed herein are a class of anion exchange resins containing two different exchange sites with improved selectivity and sorptive capability for chemical species in solution, such as heptavalent technetium (as pertechnetate anion, TcO.sub.4.sup.-). The resins are prepared by first reacting haloalkylated crosslinked copolymer beads with a large tertiary amine in a solvent in which the resin beads can swell, followed by reaction with a second, smaller, tertiary amine to more fully complete the functionalization of the resin. The resins have enhanced selectivity, capacity, and exchange kinetics.
    Type: Grant
    Filed: September 2, 1997
    Date of Patent: May 9, 2000
    Assignee: Lockheed Martin Energy Research Corporation
    Inventors: Spiro D. Alexandratos, Gilbert M. Brown, Peter V. Bonnesen, Bruce A. Moyer
  • Patent number: 4758539
    Abstract: A process for preparing ceramic nitrides and carbonitrides in the form of very pure, fine particulate powder. Appropriate precursor is prepared by reacting a transition metal alkylamide with ammonia to produce a mixture of metal amide and metal imide in the form of an easily pyrolyzable precipitate.
    Type: Grant
    Filed: February 25, 1987
    Date of Patent: July 19, 1988
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Gilbert M. Brown, Leon Maya
  • Patent number: 4432945
    Abstract: An improvement in effecting uranium recovery from phosphoric acid solutions is provided by sparging dissolved oxygen contained in solutions and solvents used in a reductive stripping stage with an effective volume of a nonoxidizing gas before the introduction of the solutions and solvents into the stage. Effective volumes of nonoxidizing gases, selected from the group consisting of argon, carbon dioxide, carbon monoxide, helium, hydrogen, nitrogen, sulfur dioxide, and mixtures thereof, displace oxygen from the solutions and solvents thereby reduce deleterious effects of oxygen such as excessive consumption of elemental or ferrous and accumulation of complex iron phosphates or cruds.
    Type: Grant
    Filed: November 4, 1981
    Date of Patent: February 21, 1984
    Assignee: The United States of America as represented by the Department of Energy
    Inventors: Fred J. Hurst, Gilbert M. Brown, Franz A. Posey