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Norimasa Yoshida

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  • Yokohama, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Process for producing partially hydrolyzed acrylamide polymer
    • Patent number 4,535,131
    • Issue date Aug 13, 1985
    • Nitto Kagaku Kabushiki Kaisha
    • Ryoji Handa
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Modification of acrylamide polymers
    • Patent number 4,313,863
    • Issue date Feb 2, 1982
    • Nitto Chemical Industry Co. Ltd.
    • Ryoji Handa
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for producing acrylamide polymers
    • Patent number 4,306,045
    • Issue date Dec 15, 1981
    • Nitto Chemical Industry Co., Ltd.
    • Norimasa Yoshida
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Method for preparing acrylamide polymers
    • Patent number 4,306,048
    • Issue date Dec 15, 1981
    • Nitto Chemical Industry Co., Ltd.
    • Norimasa Yoshida
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...