Patents by Inventor Kouhei Okuyama

Kouhei Okuyama 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 material for electric double layer capacitor and process for producing the same, electrode for electric double layer capacitor, and electric double layer capacitor
    Patent number: 7948738
    Abstract: The present invention provides an electrode material for an electric double layer capacitor which can provide an electric double layer capacitor having a low internal resistance and a large capacitance, a process for producing the same, and an electrode for an electric double layer capacitor and an electric double layer capacitor using the same. The electrode material of the present invention is characterized by comprising a carbonaceous material and an activated carbon, the carbonaceous material obtained by thermal-treating or activating a fullerene-containing soot or an extracted residue obtained by substantially extracting at least a part of fullerene from a fullerene-containing soot using a solvent. The electrode for an electric double layer capacitor and the electric double layer capacitor of the present invention is characterized by using the electrode material.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: May 24, 2011
    Assignee: Panasonic Corporation
    Inventors: Hideki Shimamoto, Chiho Yamada, Kouhei Okuyama, Hisatsugu Izuhara, Mitsumasa Hijiriyama
  • Electrode Material for Electric Double Layer Capacitor and Process for Producing the Same, Electrode for Electric Double Layer Capacitor, and Electric Double Layer Capacitor
    Publication number: 20090026422
    Abstract: The present invention provides an electrode material for an electric double layer capacitor which can provide an electric double layer capacitor having a low internal resistance and a large capacitance, a process for producing the same, and an electrode for an electric double layer capacitor and an electric double layer capacitor using the same. The electrode material of the present invention is characterized by comprising a carbonaceous material and an activated carbon, the carbonaceous material obtained by thermal-treating or activating a fullerene-containing soot or an extracted residue obtained by substantially extracting at least a part of fullerene from a fullerene-containing soot using a solvent. The electrode for an electric double layer capacitor and the electric double layer capacitor of the present invention is characterized by using the electrode material.
    Type: Application
    Filed: April 6, 2006
    Publication date: January 29, 2009
    Inventors: Hideki Shimamoto, Chiho Yamada, Kouhei Okuyama, Hisatsugu Izuhara, Mitsumasa Hijiriyama
  • Method of making carbon fiber reinforced carbon composites
    Patent number: 5578255
    Abstract: Disclosed herein is a method for preparing carbon fiber reinforced carbon composites comprising:subjecting short fibers composed of bundles of multiple single fibers to dry or wet fibrillation;preparing a sheet oriented in the two-dimensional random direction; andafter impregnating the obtained sheet with resins pitches and laminating the sheet followed by molding, subjecting the molded product to baking and densification treatments.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: November 26, 1996
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Kouhei Okuyama, Kazuo Niwa, Toshihiro Fukagawa