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Yasuhiko Kohtoku

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  • Ube, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Ceramic composite material and porous ceramic material
    • Patent number 5,981,415
    • Issue date Nov 9, 1999
    • UBE Industries, Ltd.
    • Yoshiharu Waku
    • C30 - CRYSTAL GROWTH
  • Information Patent Grant

    Fused ceramic composite
    • Patent number 5,902,763
    • Issue date May 11, 1999
    • Ube Industries, Inc.
    • Yoshiharu Waku
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Ceramic composite material
    • Patent number 5,569,547
    • Issue date Oct 29, 1996
    • Ube Industries, Ltd.
    • Yoshiharu Waku
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Ceramic composite material
    • Patent number 5,484,752
    • Issue date Jan 16, 1996
    • Ube Industries, Ltd.
    • Yoshiharu Waku
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Sialon-based sintered body and process for producing same
    • Patent number 5,200,374
    • Issue date Apr 6, 1993
    • Ube Industries, Ltd.
    • Tetsuo Yamada
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Process for producing .alpha.-Sialon powder
    • Patent number 4,845,059
    • Issue date Jul 4, 1989
    • UBE Industries, Ltd.
    • Yasuhiko Kohtoku
    • C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
  • Information Patent Grant

    Method for producing sialon powders
    • Patent number 4,812,298
    • Issue date Mar 14, 1989
    • Ube Industries, Ltd.
    • Yasuhiko Kohtoku
    • C01 - INORGANIC CHEMISTRY