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Kei Sakamoto

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  • Kawasaki, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Developer for photosensitive polyimide resin composition
    • Patent number 6,403,289
    • Issue date Jun 11, 2002
    • Nippon Zeon Co., Ltd.
    • Akira Tanaka
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Photosensitive polyimide resin composition
    • Patent number 6,160,081
    • Issue date Dec 12, 2000
    • Nippon Zeon Co., Ltd.
    • Akira Tanaka
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Pattern forming process
    • Patent number 5,886,136
    • Issue date Mar 23, 1999
    • Nippon Zeon Co., Ltd.
    • Akira Tanaka
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Photosensitive polyimide resin composition
    • Patent number 5,777,068
    • Issue date Jul 7, 1998
    • Nippon Zeon Co., Ltd.
    • Akira Tanaka
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY