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Masahisa Okawa

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  • Niihama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Catalyst system for olefin polymerization and method for production...
    • Patent number 5,026,889
    • Issue date Jun 25, 1991
    • Sumitomo Chemical Company, Limited
    • Akinobu Shiga
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Vinyl chloride-grafted ethylene copolymer and process for producing...
    • Patent number 4,748,210
    • Issue date May 31, 1988
    • Sumitomo Chemical Co., Ltd.
    • Masahisa Okawa
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for producing highly stereoregular .alpha.-olefin polymers
    • Patent number 4,485,035
    • Issue date Nov 27, 1984
    • Sumitomo Chemical Company, Limited
    • Akinobu Shiga
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for producing olefin polymers
    • Patent number 4,364,851
    • Issue date Dec 21, 1982
    • Sumitomo Chemical Company, Limited
    • Akinobu Shiga
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Olefin polymerization catalyst
    • Patent number 4,304,892
    • Issue date Dec 8, 1981
    • Sumitomo Chemical Co., Ltd.
    • Akinobu Shiga
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Catalyst system
    • Patent number 4,279,776
    • Issue date Jul 21, 1981
    • Sumitomo Chemical Company, Limited
    • Akinobu Shiga
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Olefin polymerization catalyst
    • Patent number 4,246,135
    • Issue date Jan 20, 1981
    • Sumitomo Chemical Company, Limited
    • Akinobu Shiga
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Catalysts for the polymerization of olefins
    • Patent number 4,243,786
    • Issue date Jan 6, 1981
    • Sumitomo Chemical Co., Ltd.
    • Akinobu Shiga
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for producing highly stereoregular .alpha.-olefin polymers
    • Patent number 4,235,984
    • Issue date Nov 25, 1980
    • Sumitomo Chemical Company, Limited
    • Akinobu Shiga
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Catalysts for the polymerization of olefins
    • Patent number 4,183,824
    • Issue date Jan 15, 1980
    • Sumitomo Chemical Company, Limited
    • Akinobu Shiga
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Catalysts for the polymerization of olefins
    • Patent number 4,165,298
    • Issue date Aug 21, 1979
    • Sumitomo Chemical Company, Limited
    • Akinobu Shiga
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...