Patents by Inventor Toyokazu Matsuyama

Toyokazu Matsuyama 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).

  • Ceramic member with fine protrusions on surface and method of producing the same
    Patent number: 6861122
    Abstract: The ceramic member of this invention is formed on the surfaces of crystal grains with a plurality of protrusions having smaller diameter than that of the crystal grain, said crystal grain composing at least the surface or its vicinity of a dense ceramic base material of purity being 95 wt % or higher. Such ceramic members may be produced by performing the surface of a dense ceramic base material with a corrosion treatment in an acid etchant, the dense ceramic base material having purity of 95 wt % or higher and exceeding 90% of a theoretical density, whereby ceramic grains existing on the surface or its vicinity of the base material are formed on the surface thereof with a plurality of protrusions.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: March 1, 2005
    Assignee: Toshiba Ceramics Co., Ltd.
    Inventors: Kazuhide Kawai, Shunzo Shimai, Makoto Takahashi, Hiroaki Shitara, Fumio Tokuoka, Masahiko Ichishima, Takashi Suzuki, Toyokazu Matsuyama, Hideo Uemoto
  • Ceramic member with fine protrusions on surface and method of producing the same
    Publication number: 20030019843
    Abstract: The ceramic member of this invention is formed on the surfaces of crystal grains with a plurality of protrusions having smaller diameter than that of the crystal grain, said crystal grain composing at least the surface or its vicinity of a dense ceramic base material of purity being 95 wt % or higher. Such ceramic members may be produced by performing the surface of a dense ceramic base material with a corrosion treatment in an acid etchant, the dense ceramic base material having purity of 95 wt % or higher and exceeding 90% of a theoretical density, whereby ceramic grains existing on the surface or its vicinity of the base material are formed on the surface thereof with a plurality of protrusions.
    Type: Application
    Filed: January 31, 2002
    Publication date: January 30, 2003
    Applicant: TOSHIBA CERAMICS CO., LTD.
    Inventors: Kazuhide Kawai, Shunzo Shimai, Makoto Takahashi, Hiroaki Shitara, Fumio Tokuoka, Masahiko Ichishima, Takashi Suzuki, Toyokazu Matsuyama, Hideo Uemoto