TREA

Keisaku Yamamoto

Follow

Person

  • Chiba-ken, JP
People

Patents Grantslast 30 patents

  • Information Patent Grant

    Propylenic copolymer and thermoplastic resin composition
    • Patent number 6,458,901
    • Issue date Oct 1, 2002
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Propylene copolymer
    • Patent number 6,121,401
    • Issue date Sep 19, 2000
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Rubber composition
    • Patent number 6,087,424
    • Issue date Jul 11, 2000
    • Sumitomo Chemical Company Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Rubber composition
    • Patent number 5,703,151
    • Issue date Dec 30, 1997
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    (Meth)acrylate copolymer and its elastomer compositions
    • Patent number 5,610,226
    • Issue date Mar 11, 1997
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Automotive weather strip
    • Patent number 5,548,012
    • Issue date Aug 20, 1996
    • Sumitomo Chemical Company, Ltd.
    • Keisaku Yamamoto
    • B32 - LAYERED PRODUCTS
  • Information Patent Grant

    Rubber composition
    • Patent number 5,523,353
    • Issue date Jun 4, 1996
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for producing ethylene-alpha-olefin copolymer rubber
    • Patent number 5,516,862
    • Issue date May 14, 1996
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Rubber compositions for sponge rubber
    • Patent number 5,462,975
    • Issue date Oct 31, 1995
    • Sumitomo Chemical Co., Ltd.
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for producing graft polymer
    • Patent number 5,459,199
    • Issue date Oct 17, 1995
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Rubber composition
    • Patent number 5,438,101
    • Issue date Aug 1, 1995
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Rubber composition for tire treads
    • Patent number 5,430,086
    • Issue date Jul 4, 1995
    • Sumitomo Rubber Industries
    • Yuichi Saito
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Rubber compositions and vulcanized rubber compositions
    • Patent number 5,344,881
    • Issue date Sep 6, 1994
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Vulcanizable epoxy group-containing elastomer composition
    • Patent number 5,292,825
    • Issue date Mar 8, 1994
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Butadiene copolymer and process for preparing same
    • Patent number 5,290,878
    • Issue date Mar 1, 1994
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Vulcanized rubber composition and rubber vibration insulator
    • Patent number 5,288,810
    • Issue date Feb 22, 1994
    • Sumitomo Chemical Company Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for producing graft polymer
    • Patent number 5,274,042
    • Issue date Dec 28, 1993
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Rubber composition
    • Patent number 5,250,627
    • Issue date Oct 5, 1993
    • Sumitomo Chemical Company, Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Method for purifying ethylene-.alpha.-olefin copolymer
    • Patent number 5,245,007
    • Issue date Sep 14, 1993
    • Sumitomo Chemical Co., Ltd.
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Modified diene polymer rubbers
    • Patent number 5,219,938
    • Issue date Jun 15, 1993
    • Sumitomo Chemical Company, Limited
    • Akio Imai
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Catalyst for olefinic hydrocarbon polymerization and process and pr...
    • Patent number 5,191,041
    • Issue date Mar 2, 1993
    • Sumitomo Chemical Co., Ltd.
    • Hayato Saba
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Modified polymer rubber and process for preparing the same
    • Patent number 5,189,108
    • Issue date Feb 23, 1993
    • Sumitomo Chemical Company, Limited
    • Akio Imai
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Modified diene polymer rubbers
    • Patent number 5,128,416
    • Issue date Jul 7, 1992
    • Sumitomo Chemical Company, Limited
    • Akio Imai
    • B60 - VEHICLES IN GENERAL
  • Information Patent Grant

    Catalyst for olefinic hydrocarbon polymerization and process for pr...
    • Patent number 5,122,493
    • Issue date Jun 16, 1992
    • Sumitomo Chemical Co., Ltd.
    • Hayato Saba
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Rubber composition
    • Patent number 5,100,964
    • Issue date Mar 31, 1992
    • Sumitomo Chemical Co., Ltd.
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Rubber for sponge and rubber composition for sponge
    • Patent number 5,093,381
    • Issue date Mar 3, 1992
    • Sumitomo Chemical Co., Ltd.
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Ethylene-.alpha.-olefin copolymer and process for producing the same
    • Patent number 5,082,908
    • Issue date Jan 21, 1992
    • Sumitomo Chemical Co., Ltd.
    • Akio Imai
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Vulcanizable epoxy group-containing elastomer composition
    • Patent number 5,039,756
    • Issue date Aug 13, 1991
    • Sumitomo Chemical Co., Ltd.
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    High-hardness rubber composition
    • Patent number 4,946,888
    • Issue date Aug 7, 1990
    • Sumitomo Chemical Company Limited
    • Keisaku Yamamoto
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Diene rubber composition, method of preparing the same and tire emp...
    • Patent number 4,537,936
    • Issue date Aug 27, 1985
    • Sumitomo Chemical Company, Limited
    • Hiroyoshi Takao
    • B60 - VEHICLES IN GENERAL