Patents by Inventor Barbara Jeffries-Nakamura

Barbara Jeffries-Nakamura 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).

  • Direct methanol feed fuel cell and system
    Patent number: 7488548
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous. The fuel cell system also comprises a fuel supplying part including a meter which meters an amount of fuel which is used by the fuel cell, and controls the supply of fuel based on said metering.
    Type: Grant
    Filed: August 30, 2004
    Date of Patent: February 10, 2009
    Assignee: California Institute of Technology
    Inventors: Subbarao Surampudi, Harvey A. Frank, Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Direct methanol feed fuel cell and system
    Patent number: 7470478
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: December 30, 2008
    Assignee: California Institute of Technology
    Inventors: Subbarao Surampudi, Harvey A. Frank, Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Direct methanol feed fuel cell and system
    Patent number: 7425384
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Grant
    Filed: September 1, 2004
    Date of Patent: September 16, 2008
    Assignee: California Institute of Technology
    Inventors: Subbarao Surampudi, Harvey A. Frank, Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Hydrogen generation by electrolysis of aqueous organic solutions
    Patent number: 7056428
    Abstract: A device for electrolysis of an aqueous solution of an organic fuel. The electrolyte is a solid-state polymer membrane with anode and cathode catalysts on both surfaces for electro-oxidization and electro-reduction. A low-cost and portable hydrogen generator can be made based on the device with organic fuels such as methanol.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: June 6, 2006
    Assignee: California Institute of Technology
    Inventors: Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Thomas I. Valdez
  • Direct methanol feed fuel cell and system
    Publication number: 20060105210
    Abstract: Improvements to non-acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Application
    Filed: October 17, 2005
    Publication date: May 18, 2006
    Inventors: Subbarao Surampudi, Harvey Frank, Sekharipuram Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Direct methanol feed fuel cell and system
    Publication number: 20060046133
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Application
    Filed: September 1, 2004
    Publication date: March 2, 2006
    Inventors: Subbarao Surampudi, Harvey Frank, Sekharipuram Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Direct methanol feed fuel cell and system
    Publication number: 20050042487
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Application
    Filed: August 30, 2004
    Publication date: February 24, 2005
    Inventors: Subbarao Surampudi, Harvey Frank, Sekharipuram Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Direct methanol feed fuel cell and system
    Publication number: 20050003254
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Application
    Filed: March 9, 2004
    Publication date: January 6, 2005
    Inventors: Subbarao Surampudi, Harvey Frank, Sekharipuram Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Direct methanol feed fuel cell and system
    Patent number: 6703150
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Grant
    Filed: June 27, 2001
    Date of Patent: March 9, 2004
    Assignee: California Institute of Technology
    Inventors: Subbarao Surampudi, Harvey A. Frank, Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Hydrogen generation by electrolysis of aqueous organic solutions
    Publication number: 20030226763
    Abstract: A device for electrolysis of an aqueous solution of an organic fuel. The electrolyte is a solid-state polymer membrane with anode and cathode catalysts on both surfaces for electro-oxidation and electro-reduction. A low-cost and portable hydrogen generator can be made based on the device with organic fuels such as methanol.
    Type: Application
    Filed: March 18, 2003
    Publication date: December 11, 2003
    Applicant: California Institute of Technology
    Inventors: Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Thomas I. Valdez
  • Direct methanol feed fuel cell and system
    Patent number: 6589684
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: July 8, 2003
    Assignee: California Institute of Technology
    Inventors: Subbarao Surampudi, Harvey A. Frank, Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Hydrogen generation by electrolysis of aqueous organic solutions
    Patent number: 6533919
    Abstract: A method for electrolysis of an aqueous solution of an organic fuel. The electrolyte is a solid-state polymer membrane with anode and cathode catalysts on both surfaces for electro-oxidation and electro-reduction.
    Type: Grant
    Filed: October 10, 2000
    Date of Patent: March 18, 2003
    Assignee: California Institute of Technology
    Inventors: Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Thomas I. Valdez
  • Hydrogen generation by electrolysis of aqueous organic solutions
    Patent number: 6432284
    Abstract: A device for electrolysis of an aqueous solution of an organic fuel. The electrolyte is a solid-state polymer membrane with anode and cathode catalysts on both surfaces for electro-oxidization and electro-reduction. A low-cost and portable hydrogen generator can be made based on the device with organic fuels such as methanol.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: August 13, 2002
    Assignee: California Institute of Technology
    Inventors: Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Thomas I. Valdez
  • Direct methanol feed fuel cell and system
    Patent number: 6420059
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: July 16, 2002
    Assignee: California Institute of Technology
    Inventors: Subbarao Surampudi, Harvey A. Frank, Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Hydrogen generation by electrolysis of aqueous organic solutions
    Patent number: 6368492
    Abstract: A device for electrolysis of an aqueous solution of an organic fuel. The electrolyte is a solid-state polymer membrane with anode and cathode catalysts on both surfaces for electro-oxidization and electro-reduction. A low-cost and portable hydrogen generator can be made based on the device with organic fuels such as methanol.
    Type: Grant
    Filed: February 17, 2000
    Date of Patent: April 9, 2002
    Assignee: California Institute of Technology
    Inventors: Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Thomas I. Valdez
  • Direct deposit of catalyst on the membrane of direct feed fuel cells
    Publication number: 20010052389
    Abstract: An improved direct liquid-feed fuel cell having a solid membrane electrolyte for electrochemical reactions of an organic fuel. Catalyst utilization and catalyst/membrane interface improvements are disclosed. Specifically, the catalyst layer is applied directly onto the membrane electrolyte.
    Type: Application
    Filed: August 20, 2001
    Publication date: December 20, 2001
    Applicant: California Institute of Technology, California corporation
    Inventors: William Chun, Sekharipuram R. Narayanan, Barbara Jeffries-Nakamura, Thomas I. Valdez, Juergen Linke
  • Direct methanol feed fuel cell and system
    Publication number: 20010050230
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Application
    Filed: June 27, 2001
    Publication date: December 13, 2001
    Applicant: California Institute of Technology
    Inventors: Subbaroa Surampudi, Harvey A. Frank, Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Direct methanol feed fuel cell and system
    Patent number: 6303244
    Abstract: Improvements to non acid methanol fuel cells include new formulations for materials. The platinum and ruthenium are more exactly mixed together. Different materials are substituted for these materials. The backing material for the fuel cell electrode is specially treated to improve its characteristics. A special sputtered electrode is formed which is extremely porous.
    Type: Grant
    Filed: November 3, 1999
    Date of Patent: October 16, 2001
    Assignee: California institute of Technology
    Inventors: Subbarao Surampudi, Harvey A. Frank, Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Andrew Kindler, Gerald Halpert
  • Hydrogen generation by electrolysis of aqueous organic solutions
    Patent number: 6299744
    Abstract: A device for electrolysis of an aqueous solution of an organic fuel. The electrolyte is a solid-state polymer membrane with anode and cathode catalysts on both surfaces for electro-oxidization and electro-reduction. A low-cost and portable hydrogen generator can be made based on the device with organic fuels such as methanol.
    Type: Grant
    Filed: July 28, 1998
    Date of Patent: October 9, 2001
    Assignee: California Institute of Technology
    Inventors: Sekharipuram R. Narayanan, William Chun, Barbara Jeffries-Nakamura, Thomas I. Valdez
  • Direct deposit of catalyst on the membrane of direct feed fuel cells
    Patent number: 6277447
    Abstract: An improved direct liquid-feed fuel cell having a solid membrane electrolyte for electrochemical reactions of an organic fuel. Catalyst utilization and catalyst/membrane interface improvements are disclosed. Specifically, the catalyst layer is applied directly onto the membrane electrolyte.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: August 21, 2001
    Assignee: California Institute of Technology
    Inventors: William Chun, Sekharipuram R. Narayanan, Barbara Jeffries-Nakamura, Thomas I. Valdez, Juergen Linke