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Hans-Dieter Grasshoff

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  • Hamburg, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Liquid composition and its use as magneto-rheological liquid
    • Patent number 6,245,253
    • Issue date Jun 12, 2001
    • RWE-DEA Aktiengesellschaft fuer Mineraloel und Chemie
    • Hans-Dieter Grasshoff
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Synthetic ester lubricants for refrigerator systems
    • Patent number 5,830,833
    • Issue date Nov 3, 1998
    • RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie and Texaco Deutschland GmbH
    • Hans Dieter Grasshoff
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Homogeneous electroviscous fluids using aluminum compounds
    • Patent number 5,800,731
    • Issue date Sep 1, 1998
    • RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie
    • Dietrich Pirck
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Non-polluting shock absorber and level controller fluids
    • Patent number 5,474,714
    • Issue date Dec 12, 1995
    • RWE-DEA Aktiengesellschaft fur Mineraloel und Chemie
    • Dietrich Pirck
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricant composition for refrigerator systems
    • Patent number 5,049,292
    • Issue date Sep 17, 1991
    • Texaco Technologie Europa GmbH
    • Hans D. Grasshoff
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricating greases for high operating temperatures
    • Patent number 4,737,299
    • Issue date Apr 12, 1988
    • Texaco Technologie Europa GmbH
    • Hans D. Grasshoff
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricant for use in non-chip metal forming
    • Patent number 4,138,348
    • Issue date Feb 6, 1979
    • Deutsche Texaco Aktiengesellschaft
    • Hans D. Grasshoff
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Biodegradable grease composition
    • Patent number 4,115,282
    • Issue date Sep 19, 1978
    • Deutsche Texaco Aktiengesellschaft
    • Hans Dieter Grasshoff
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...