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Akihiro Naka

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Patents Grantslast 30 patents

  • Information Patent Grant

    Polyhydroxy aromatic compounds, epoxy resins derived therefrom and...
    • Patent number 5,334,674
    • Issue date Aug 2, 1994
    • Dai-Ichi Kogyo Seiyaku Co., Ltd.
    • Akihiro Naka
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Poly-hydroxynaphthalene compounds and epoxy resin composition
    • Patent number 5,302,673
    • Issue date Apr 12, 1994
    • Dai-Ichi Kogyo Seiyaku Co., Ltd.
    • Akihiro Naka
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Production of aqueous coal slurries having high coal contents
    • Patent number 4,592,759
    • Issue date Jun 3, 1986
    • Dai-Ichi Kogyo Seiyaku Co., Ltd.
    • Akihiro Naka
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Stabilized coal-oil mixture
    • Patent number 4,389,219
    • Issue date Jun 21, 1983
    • Dai-Ichi Kogyo Seiyaku Co., Ltd.
    • Akihiro Naka
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Stabilized fuel slurry
    • Patent number 4,251,229
    • Issue date Feb 17, 1981
    • Dai-Ichi Kogyo Seiyaku Co., Ltd.
    • Akihiro Naka
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Stabilized fuel slurry
    • Patent number 4,195,975
    • Issue date Apr 1, 1980
    • Dai-Ich Kogyo Seiyaku Co., Ltd.
    • Yasumasa Hamuro
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...