Patents by Inventor Michiaki Katoh

Michiaki Katoh 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).

  • Solid polyelectrolyte fuel cell having a solid polyelectrolyte membrane with varying water content
    Patent number: 6355370
    Abstract: A solid polyelectrolyte fuel cell has (a) a positive electrode, (b) a negative electrode, and (c) a solid polyelectrolyte membrane containing water, between the positive electrode and the negative electrode, where the water content of portions of the solid polyelectrolyte membrane adjacent to the negative electrode is greater than the water content of portions of the solid polyelectrolyte membrane adjacent to the positive electrode. The cell outputs high voltage and has good properties.
    Type: Grant
    Filed: November 27, 1998
    Date of Patent: March 12, 2002
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Michiaki Katoh, Michio Asukabe, Chiaki Yamada, Shinji Nezu
  • SOLID POLYELECTROLYTE-TYPE FUEL CELL HAVING A SOLID POLYELECTROLYTE MEMBRANE WITH VARYING WATER CONTENT
    Publication number: 20020001742
    Abstract: A solid polyelectrolyte fuel cell has (a) a positive electrode, (b) a negative electrode, and (c) a solid polyelectrolyte membrane containing water, between the positive electrode and the negative electrode, where the water content of portions of the solid polyelectrolyte membrane adjacent to the negative electrode is greater than the water content of portions of the solid polyelectrolyte membrane adjacent to the positive electrode. The cell outputs high voltage and has good properties.
    Type: Application
    Filed: November 27, 1998
    Publication date: January 3, 2002
    Inventors: MICHIAKI KATOH, MICHIO ASUKABE, CHIAKI YAMADA, SHINJI NEZU
  • Solid polyelectrolyte-type fuel cell
    Patent number: 6224994
    Abstract: A solid polyelectrolyte membrane for a fuel cell includes (a) a hydrocarbon polymer grafted fluorine polymer, which contains sulfonic acid groups, and (b) whisker fibers, fixed to the grafted fluorine polymer. The fiber may be surface-treated with a silane coupling agent which reacts with the fluorine polymer and the fibers, prior to graft-copolymerization.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: May 1, 2001
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Michio Asukabe, Chiaki Yamada, Michiaki Katoh, Shinji Nezu