Patents by Inventor Andre Yavrouian

Andre Yavrouian 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).

  • Polymer electrolyte membrane assembly for fuel cells
    Patent number: 6444341
    Abstract: An electrolyte membrane for use in a fuel cell can contain sulfonated polyphenylether sulfones. The membrane can contain a first sulfonated polyphenylether sulfone and a second sulfonated polyphenylether sulfone, wherein the first sulfonated polyphenylether and the second sulfonated polyphenylether sulfone have equivalent weights greater than about 560, and the first sulfonated polyphenylether and the second sulfonated polyphenylether sulfone also have different equivalent weights. Also, a membrane for use in a fuel cell can contain a sulfonated polyphenylether sulfone and an unsulfonated polyphenylether sulfone. Methods for manufacturing a membrane electrode assemblies for use in fuel cells can include roughening a membrane surface. Electrodes and methods for fabricating such electrodes for use in a chemical fuel cell can include sintering an electrode. Such membranes and electrodes can be assembled into chemical fuel cells.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: September 3, 2002
    Assignee: California Institute of Technology
    Inventors: Shiao-Ping S. Yen, Andrew Kindler, Andre Yavrouian, Gerald Halpert
  • Polymer electrolyte membrane assembly for fuel cells
    Patent number: 6399235
    Abstract: An electrolyte membrane for use in a fuel cell can contain sulfonated polyphenylether sulfones. The membrane can contain a first sulfonated polyphenylether sulfone and a second sulfonated polyphenylether sulfone, wherein the first sulfonated polyphenylether and the second sulfonated polyphenylether sulfone have equivalent weights greater than about 560, and the first sulfonated polyphenylether and the second sulfonated polyphenylether sulfone also have different equivalent weights. Also, a membrane for use in a fuel cell can contain a sulfonated polyphenylether sulfone and an unsulfonated polyphenylether sulfone. Methods for manufacturing a membrane electrode assemblies for use in fuel cells can include roughening a membrane surface. Electrodes and methods for fabricating such electrodes for use in a chemical fuel cell can include sintering an electrode. Such membranes and electrodes can be assembled into chemical fuel cells.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: June 4, 2002
    Assignee: California Institute of Technology
    Inventors: Shiao-Ping S. Yen, Andrew Kindler, Andre Yavrouian, Gerald Halpert
  • Polymer electrolyte membrane assembly for fuel cells
    Patent number: 6150047
    Abstract: An electrolyte membrane for use in a fuel cell can contain sulfonated polyphenylether sulfones. The membrane can contain a first sulfonated polyphenylether sulfone and a second sulfonated polyphenylether sulfone, wherein the first sulfonated polyphenylether and the second sulfonated polyphenylether sulfone have equivalent weights greater than about 560, and the first sulfonated polyphenylether and the second sulfonated polyphenylether sulfone also have different equivalent weights. Also, a membrane for use in a fuel cell can contain a sulfonated polyphenylether sulfone and an unsulfonated polyphenylether sulfone. Methods for manufacturing a membrane electrode assemblies for use in fuel cells can include roughening a membrane surface. Electrodes and methods for fabricating such electrodes for use in a chemical fuel cell can include sintering an electrode. Such membranes and electrodes can be assembled into chemical fuel cells.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: November 21, 2000
    Assignee: California Institute of Technology
    Inventors: Shiao-Ping S. Yen, Andrew Kindler, Andre Yavrouian, Gerald Halpert
  • Polymer material for electrolytic membranes in fuel cells
    Patent number: 5795496
    Abstract: A polymer, PEEK or SPES is processed to use it as a proton conducting membrane for a fuel cell. Asymmetric properties are formed.
    Type: Grant
    Filed: November 22, 1995
    Date of Patent: August 18, 1998
    Assignee: California Institute of Technology
    Inventors: Shaio-Ping S. Yen, Sekharipuram R. Narayanan, Gerald Halpert, Eva Graham, Andre Yavrouian