Patents by Inventor Yasunobu Iizuka

Yasunobu Iizuka 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).

  • Fuel cell separator, a fuel cell using the fuel cell separator, and a method for making the fuel cell separator
    Patent number: 6544680
    Abstract: A fuel cell separator including (a) about 100 parts by weight of graphitized meso-carbon microbeads, (b) about 10 to 35 parts by weight of one of a thermosetting resin and a thermoplastic resin, and (c) about 1 to 40 parts by weight of at least one carbonaceous material selected from the group consisting of graphite powder, carbon black, and fine carbon fibers. The fuel cell separator exhibits low electrical resistivity, low volume resistivity, superior gas impermeability, and superior dimensional accuracy without a graphitizing treatment after molding. A fuel cell using the fuel cell separators can be produced while saving energy using a simplified facility and has superior generation efficiency.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: April 8, 2003
    Assignee: Kawasaki Steel Corporation
    Inventors: Shigeru Takano, Kenichi Uehara, Yasunobu Iizuka, Hitomi Hatano