Patents by Inventor Takeshi Koshikawa

Takeshi Koshikawa 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).

  • Carbon foam, graphite foam and production processes of these
    Patent number: 6689336
    Abstract: A carbon foam obtained by heat-treating a mesophase pitch whose softening point is 300° C. or less according to an elevated flow tester, whose ratio (Daromatic/Daliphatic) of the absorption intensity of an aromatic C—H stretching vibration, measured with FT-IR, to the absorption intensity of an aliphatic C—H stretching vibration, measured with FT-IR, is 4.0 or less and whose optically anisotropic content is at least 80%, a graphite foam obtained by heat-treating the carbon foam recited above at a temperature of 2,000° C. or higher and production processes of these.
    Type: Grant
    Filed: January 23, 2002
    Date of Patent: February 10, 2004
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Koichi Kanno, Hirotaka Tsuruya, Ryuji Fujiura, Takeshi Koshikawa, Fumitaka Watanabe
  • Carbon foam, graphite foam and production processes of these
    Publication number: 20020136680
    Abstract: A carbon foam obtained by heat-treating a mesophase pitch whose softening point is 300° C. or less according to an elevated flow tester, whose ratio (Daromatic/Daliphatic) of the absorption intensity of an aromatic C-H stretching vibration, measured with FT-IR, to the absorption intensity of an aliphatic C-H stretching vibration, measured with FT-IR, is 4.0 or less and whose optically anisotropic content is at least 80%, a graphite foam obtained by heat-treating the carbon foam recited above at a temperature of 2,000° C. or higher and production processes of these.
    Type: Application
    Filed: January 23, 2002
    Publication date: September 26, 2002
    Inventors: Koichi Kanno, Hirotaka Tsuruya, Ryuji Fujiura, Takeshi Koshikawa, Fumitaka Watanabe
  • Process for producing benzoyl chlorides
    Patent number: 5872291
    Abstract: Provided is a process for producing benzoyl chlorides which comprises reacting an aromatic aldehyde with chlorine in liquid phase in the presence of inert gas, whereby the generation of benzal chlorides by products whose separation is difficult can be suppressed.
    Type: Grant
    Filed: December 18, 1997
    Date of Patent: February 16, 1999
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Takeshi Koshikawa, Toshihiro Hashimoto, Makoto Takagawa