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Saburo Koyama

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Patents Grantslast 30 patents

  • Information Patent Grant

    Organic compound hydrogenation apparatus and method for hydrogenati...
    • Patent number 7,846,319
    • Issue date Dec 7, 2010
    • Idemitsu Kosan Co., Ltd.
    • Saburo Koyama
    • C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
  • Information Patent Grant

    Method of reducing/regenerating oil or preventing oxidization/degen...
    • Patent number 7,670,474
    • Issue date Mar 2, 2010
    • Idemitsu Kosan Co., Ltd.
    • Saburo Koyama
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Metal working oil composition
    • Patent number 6,562,766
    • Issue date May 13, 2003
    • Idemitsu Kosan Co., Ltd.
    • Saburo Koyama
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Heat treating oil composition
    • Patent number 5,376,186
    • Issue date Dec 27, 1994
    • Idemitsu Kosan Co., Ltd.
    • Hitoshi Uchida
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    Heat treating oil composition
    • Patent number 5,250,122
    • Issue date Oct 5, 1993
    • Idemitsu Kosan Co., Ltd.
    • Hitoshi Uchida
    • C21 - METALLURGY OF IRON
  • Information Patent Grant

    Lubricating oil composition
    • Patent number 5,171,903
    • Issue date Dec 15, 1992
    • Idemitsu Kosan Co., Ltd.
    • Saburo Koyama
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricating oil composition
    • Patent number 5,072,067
    • Issue date Dec 10, 1991
    • Idemitsu Kosan Company Limited
    • Saburo Koyama
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...

Patents Applicationslast 30 patents