Patents by Inventor Jun-ichi Tayanagi

Jun-ichi Tayanagi 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).

  • Process for producing electrolyte material for polymer electrolyte fuel cells, and membrane-electrode assembly for polymer electrolyte fuel cells
    Patent number: 8198394
    Abstract: A membrane-electrode assembly for polymer electrolyte fuel cells which is excellent in water repellency and gas diffusivity and which exhibits a high output power density, can be obtained by using, as an electrolyte material for polymer electrolyte fuel cells, a fluoropolymer obtained by contacting a fluoropolymer which is excellent in gas diffusivity and which has alicyclic structures in its main chain and further has sulfonic acid groups, with fluorine gas for fluorination to increase water repellency and stabilize the molecule ends.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: June 12, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Jun-ichi Tayanagi, Atsushi Watakabe, Susumu Saito, Katsuya Ueno
  • PROCESS FOR PRODUCING ELECTROLYTE MATERIAL FOR POLYMER ELECTROLYTE FUEL CELLS, AND MEMBRANE-ELECTRODE ASSEMBLY FOR POLYMER ELECTROLYTE FUEL CELLS
    Publication number: 20090215938
    Abstract: A membrane-electrode assembly for polymer electrolyte fuel cells which is excellent in water repellency and gas diffusivity and which exhibits a high output power density, can be obtained by using, as an electrolyte material for polymer electrolyte fuel cells, a fluoropolymer obtained by contacting a fluoropolymer which is excellent in gas diffusivity and which has alicyclic structures in its main chain and further has sulfonic acid groups, with fluorine gas for fluorination to increase water repellency and stabilize the molecule ends.
    Type: Application
    Filed: April 28, 2009
    Publication date: August 27, 2009
    Applicant: Ashai Glass Company, Limited
    Inventors: Jun-ichi TAYANAGI, Atsushi Watakabe, Susumu Saito, Katsuya Ueno
  • Process for producing electrolyte material for polymer electrolyte fuel cells, and membrane-electrode assembly for polymer electrolyte fuel cells
    Patent number: 7557178
    Abstract: A membrane-electrode assembly for polymer electrolyte fuel cells which is excellent in water repellency and gas diffusivity and which exhibits a high output power density, can be obtained by using, as an electrolyte material for polymer electrolyte fuel cells, a fluoropolymer obtained by contacting a fluoropolymer which is excellent in gas diffusivity and which has alicyclic structures in its main chain and further has sulfonic acid groups, with fluorine gas for fluorination to increase water repellency and stabilize the molecule ends.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: July 7, 2009
    Assignee: Asahi Glass Company, Limited
    Inventors: Jun-ichi Tayanagi, Atsushi Watakabe, Susumu Saito, Katsuya Ueno
  • Process for producing electrolyte material for polymer electrolyte fuel cells, and membrane-electrode assembly for polymer electrolyte fuel cells
    Publication number: 20060287497
    Abstract: A membrane-electrode assembly for polymer electrolyte fuel cells which is excellent in water repellency and gas diffusivity and which exhibits a high output power density, can be obtained by using, as an electrolyte material for polymer electrolyte fuel cells, a fluoropolymer obtained by contacting a fluoropolymer which is excellent in gas diffusivity and which has alicyclic structures in its main chain and further has sulfonic acid groups, with fluorine gas for fluorination to increase water repellency and stabilize the molecule ends.
    Type: Application
    Filed: July 19, 2005
    Publication date: December 21, 2006
    Applicant: Asahi Glass Company, Limited
    Inventors: Jun-ichi Tayanagi, Atsushi Watakabe, Susumu Saito, Katsuya Ueno
  • Electronic article having fluoropolymer thin film
    Patent number: 6203912
    Abstract: An electronic article having a thin film of a triazine ring-containing fluoropolymer obtained by trimerization of a cyano group of a cyano group-containing fluoropolymer having a polymerization unit of the formula (1): —[CF2—CF(A1)]—  (1) wherein A1 is —OR1CN, —CN or —R1CN, and R1 is a C1-C15 polyfluoroalkylene group which may have an ether bond.
    Type: Grant
    Filed: January 29, 1998
    Date of Patent: March 20, 2001
    Assignee: Asahi Glass Company. Ltd.
    Inventors: Atsushi Watakabe, Jun-ichi Tayanagi, Masayuki Tamura, Haruhisa Miyake