Patents by Inventor Diazaburo Yashiki

Diazaburo Yashiki 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 composition and fuel cell
    Patent number: 8273500
    Abstract: A polymer electrolyte composition obtained by mixing a plurality of ion-conductive polymers, wherein if the ion-conductive polymer that is highest in ion exchange capacity among the plurality of ion-conductive polymers is termed first ion-conductive polymer, and the ion-conductive polymer that is lowest in ion exchange capacity is termed second ion-conductive polymer, then the first ion-conductive polymer and the second ion-conductive polymer are both block copolymers composed of a segment having an ion-exchange group and a segment having substantially no ion-exchange groups, and if the weight fraction of the segment having an ion-exchange group in the first ion-conductive polymer is termed Wh1, and the weight fraction of the segment having an ion-exchange group in the second ion-conductive polymer is termed Wh2, then the relations (I) and (II) listed below are satisfied: (I) Wh1>Wh2; (II) Wh1?Wh2?0.25.
    Type: Grant
    Filed: September 25, 2008
    Date of Patent: September 25, 2012
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yasuhiro Yamashita, Diazaburo Yashiki, Mitsunori Nodono
  • POLYMER ELECTROLYTE COMPOSITION AND FUEL CELL
    Publication number: 20100196792
    Abstract: A polymer electrolyte composition obtained by mixing a plurality of ion-conductive polymers, wherein if the ion-conductive polymer having that is highest in ion exchange capacity among the plurality of ion-conductive polymers is termed first ion-conductive polymer, and the ion-conductive polymer that is lowest in ion exchange capacity is termed second ion-conductive polymer, then the first ion-conductive polymer and the second ion-conductive polymer are both block copolymers composed of a segment having an ion-exchange group and a segment having substantially no ion-exchange groups, and if the weight fraction of the segment having an ion-exchange group in the first ion-conductive polymer is termed Wh1, and the weight fraction of the segment having an ion-exchange group in the second ion-conductive polymer is termed Wh2, then the relationships (I) and (II) listed below are satisfied. Wh1>Wh2??(I) Wh1?Wh2?0.
    Type: Application
    Filed: September 25, 2008
    Publication date: August 5, 2010
    Applicant: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Yasuhiro Yamashita, Diazaburo Yashiki, Mitsunori Nodono