TREA

Kiyoshi Ukawa

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  • Osaka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    1-Azaxanthone-3-carboxylic acids and their production
    • Patent number 4,302,463
    • Issue date Nov 24, 1981
    • Takeda Chemical Industries, Ltd.
    • Toshihiro Ishiguro
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    1-Azaxanthone derivatives
    • Patent number 4,299,963
    • Issue date Nov 10, 1981
    • Takeda Chemical Industries, Ltd.
    • Akira Nohara
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    3-(Tetrazol-5-yl)-1-azaxanthones
    • Patent number 4,267,332
    • Issue date May 12, 1981
    • Takeda Chemical Industries, Ltd.
    • Akira Nohara
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    1-Azaxanthone derivatives
    • Patent number 4,255,576
    • Issue date Mar 10, 1981
    • Takeda Chemical Industries, Ltd.
    • Akira Nohara
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    1-Azaxanthone-3-carboxylic acids
    • Patent number 4,143,042
    • Issue date Mar 6, 1979
    • Takeda Chemical Industries, Ltd.
    • Akira Nohara
    • C07 - ORGANIC CHEMISTRY