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Volker Hederich

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  • Koln, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Bulk dyeing using quinophthalone dyestuffs
    • Patent number 5,874,582
    • Issue date Feb 23, 1999
    • Bayer Aktiengesellschaft
    • Stephan Michaelis
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    Bulk dyeing using quinophthalone dyestuffs
    • Patent number 5,800,573
    • Issue date Sep 1, 1998
    • Bayer Aktiengesellschaft
    • Stephan Michaelis
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    Dyestuffs for bulk dyeing plastics
    • Patent number 5,621,027
    • Issue date Apr 15, 1997
    • Bayer Aktiengesellschaft
    • Peter Roschger
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    Phthaloperinone dyestuffs
    • Patent number 5,530,130
    • Issue date Jun 25, 1996
    • Bayer Aktiengesellschaft
    • Peter Roschger
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Isoindolazines
    • Patent number 4,564,680
    • Issue date Jan 14, 1986
    • Bayer Aktiengesellschaft
    • Meinhard Rolf
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Process for the preparation of 1-hydroxy-4-amino-5(8)-nitroanthraqu...
    • Patent number 4,424,160
    • Issue date Jan 3, 1984
    • Bayer Aktiengesellschaft
    • Volker Hederich
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Azo polyether dyestuffs, formulations of these dyestuffs, their pre...
    • Patent number 4,391,606
    • Issue date Jul 5, 1983
    • Bayer Aktiengesellschaft
    • Winfried Kruckenberg
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Process for dyeing and printing cellulose fibres
    • Patent number 4,255,151
    • Issue date Mar 10, 1981
    • Bayer Aktiengesellschaft
    • Volker Hederich
    • D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
  • Information Patent Grant

    Anthrachinone dyestuffs
    • Patent number 4,222,947
    • Issue date Sep 16, 1980
    • Bayer Aktiengesellschaft
    • Volker Hederich
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...