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David K. Walters

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  • Camberley, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Lubricant compositions
    • Patent number 5,700,764
    • Issue date Dec 23, 1997
    • Ethyl Petroleum Additives Limited
    • David Kenvyn Walters
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Use of transmission and gear oil lubricants having enhanced frictio...
    • Patent number 5,691,283
    • Issue date Nov 25, 1997
    • Ethyl Petroleum Additives Limited
    • Julia C. Poat
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Polyalkylene glycol lubricant compositions
    • Patent number 5,342,531
    • Issue date Aug 30, 1994
    • Ethyl Petroleum Additives Limited
    • David K. Walters
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Friction modifier
    • Patent number RE34459
    • Issue date Nov 30, 1993
    • Ethyl Petroleum Additives, Limited
    • John V. Bullen
    • 252 - Compositions
  • Information Patent Grant

    Lubricant compositions with metal-free antiwear or load-carrying ad...
    • Patent number 5,254,272
    • Issue date Oct 19, 1993
    • Ethyl Petroleum Additives Limited
    • David K. Walters
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Friction modifier comprising a long chain succinimide derivative an...
    • Patent number 5,190,680
    • Issue date Mar 2, 1993
    • Ethyl Petroleum Additives Ltd.
    • John V. Bullen
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricant compositions
    • Patent number 5,126,064
    • Issue date Jun 30, 1992
    • Ethyl Petroleum Additives, Ltd.
    • Rodney I. Barber
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Friction modifier
    • Patent number 5,021,176
    • Issue date Jun 4, 1991
    • Ethyl Petroleum Additives, Limited
    • John V. Bullen
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricating composition containing emulsion-sludge inhibitors
    • Patent number 4,305,834
    • Issue date Dec 15, 1981
    • Ethyl Corporation
    • Rodney I. Barber
    • F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • Information Patent Grant

    Lubricating composition containing emulsion-sludge inhibitors
    • Patent number 4,305,835
    • Issue date Dec 15, 1981
    • Ethyl Corporation
    • Rodney I. Barber
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...