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Masahiro Otsuka

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  • Osaka, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Long-wavelength UV light absorber
    • Patent number 5,523,027
    • Issue date Jun 4, 1996
    • Orient Chemical Industries, Ltd.
    • Masahiro Otsuka
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    Monoazo liquid dye and solutions thereof
    • Patent number 5,428,137
    • Issue date Jun 27, 1995
    • Orient Chemical Industries, Ltd.
    • Masahiro Otsuka
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Indole compound and use of the same
    • Patent number 5,401,438
    • Issue date Mar 28, 1995
    • Orient Chemical Industries, Ltd.
    • Masahiro Otsuka
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Indole compound and use of the same
    • Patent number 5,296,519
    • Issue date Mar 22, 1994
    • Orient Chemical Industries, Ltd.
    • Masahiro Otsuka
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Magenta toner for developing electrostatic images, colored resin, c...
    • Patent number 5,254,420
    • Issue date Oct 19, 1993
    • Orient Chemical Industries, Ltd.
    • Masahiro Otsuka
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Purification of C.I. solvent black 3
    • Patent number 4,927,538
    • Issue date May 22, 1990
    • Orient Chemical Industries, Ltd.
    • Hisashi Senshu
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Nigrosine dyes and process for preparing same
    • Patent number 4,624,709
    • Issue date Nov 25, 1986
    • Orient Chemical Industrie
    • Masahiro Otsuka
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY