Patents by Inventor Atsuhito Okamoto

Atsuhito Okamoto 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).

  • Electrode catalyst substrate and method for producing the same, and polymer electrolyte fuel cell
    Patent number: 8940452
    Abstract: A method for producing an electrode catalyst substrate is provided herein, which comprises a carbon film forming step of forming a porous carbon film on a base, a hydrophilization step of hydrophilizing the porous carbon film, an immersion step of immersing the base in a solution prepared by dissolving catalytic metal ions in a polar solvent, and a reduction step of adding a reducing agent to the solution and thus reducing the catalytic metal ions. An electrode catalyst substrate obtained by the method and a polymer electrolyte fuel cell in which the electrode catalyst obtained by the method is used for anodes and/or cathodes are also provided herein. In the electrode catalyst of the present invention, fine catalyst particles are loaded in a uniform and highly dispersed manner.
    Type: Grant
    Filed: June 25, 2008
    Date of Patent: January 27, 2015
    Assignees: Toyota Jidosha Kabushiki Kaisha, Cataler Corporation
    Inventors: Kazuma Shinozaki, Atsuhito Okamoto, Tatsuya Hatanaka, Hiroaki Takahashi, Tomoaki Terada, Takahiro Nagata
  • ELECTRODE CATALYST SUBSTRATE AND METHOD FOR PRODUCING THE SAME, AND POLYMER ELECTROLYTE FUEL CELL
    Publication number: 20100330451
    Abstract: A method for producing an electrode catalyst substrate is provided herein, which comprises a carbon film forming step of forming a porous carbon film on a base, a hydrophilization step of hydrophilizing the porous carbon film, an immersion step of immersing the base in a solution prepared by dissolving catalytic metal ions in a polar solvent, and a reduction step of adding a reducing agent to the solution and thus reducing the catalytic metal ions. An electrode catalyst substrate obtained by the method and a polymer electrolyte fuel cell in which the electrode catalyst obtained by the method is used for anodes and/or cathodes are also provided herein. In the electrode catalyst of the present invention, fine catalyst particles are loaded in a uniform and highly dispersed manner.
    Type: Application
    Filed: June 25, 2008
    Publication date: December 30, 2010
    Inventors: Kazuma Shinozaki, Atsuhito Okamoto, Tatsuya Hatanaka, Hiroaki Takahashi, Tomoaki Terada, Takahiro Nagata