Patents by Inventor Hidejiro Kawana

Hidejiro Kawana 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 element for liquid fuel cell and a liquid fuel cell
    Patent number: 4493878
    Abstract: This invention is a fuel element for liquid fuel cell characterized in that a liquid fuel is rendered to assume a non-fluidized state by either physical means or chemical means, and is returned back to the initial liquid fuel at any time by physical means or chemical means.
    Type: Grant
    Filed: April 7, 1983
    Date of Patent: January 15, 1985
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuo Horiba, Kazuo Iwamoto, Hidejiro Kawana, Kazunori Fujita, Kohki Tamura
  • Fuel cell
    Patent number: 4478917
    Abstract: A methanol fuel cell with an electrolyte ion exchange membrane integrated with an oxidizer electrode containing water-repellent particles on one side of the membrane and with a hydrophilic fuel electrode containing no water-repellent particles on the other side thereof and with less contact resistance between the ion exchange membrane and the electrodes and a three-phase boundary readily formable in the oxidizer electrode.
    Type: Grant
    Filed: March 25, 1983
    Date of Patent: October 23, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Kazunori Fujita, Kohki Tamura, Hidejiro Kawana, Kazuo Iwamoto, Tatsuo Horiba
  • Methanol fuel cell
    Patent number: 4390603
    Abstract: A methanol fuel cell wherein a positive electrode and a negative electrode are disposed in contact with a solid film which exhibits a hydrogen ion- and/or hydronium ion-conductivity.The methanol permeability coefficient of the solid film of the methanol fuel cell is at most 1.times.10.sup.-6 mol/(mol/l).min.cm.sup.2.
    Type: Grant
    Filed: May 21, 1982
    Date of Patent: June 28, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Hidejiro Kawana, Tatsuo Horiba, Kazuo Iwamoto, Kazunori Fujita, Kohki Tamura