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Helen T. RYAN

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  • London, GB
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Patents Grantslast 30 patents

  • Information Patent Grant

    Lubricating composition for industrial gear fluids
    • Patent number 11,795,412
    • Issue date Oct 24, 2023
    • Afton Chemical Corporation
    • David Edwards
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Preparation and use of aminoalkylphosphonic acid dialkyl ester comp...
    • Patent number 11,149,226
    • Issue date Oct 19, 2021
    • Afton Chemical Corporation
    • Helen T. Ryan
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    Preparation and use of aminoalkylphosphonic acid dilakyl ester comp...
    • Patent number 10,563,146
    • Issue date Feb 18, 2020
    • Afton Chemical Corporation
    • Helen T. Ryan
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Friction modifiers for slideway applications
    • Patent number 8,962,539
    • Issue date Feb 24, 2015
    • Afton Chemical Corporation
    • Mark T. Devlin
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricating composition with good oxidative stability and reduced d...
    • Patent number 8,227,391
    • Issue date Jul 24, 2012
    • Afton Chemical Corporation
    • Helen T. Ryan
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricant compositions
    • Patent number 8,003,584
    • Issue date Aug 23, 2011
    • Afton Chemical Corporation
    • Mark T. Devlin
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricant compositions
    • Patent number 7,759,294
    • Issue date Jul 20, 2010
    • Afton Chemical Corporation
    • Mark T. Devlin
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricant compositions
    • Patent number 7,452,851
    • Issue date Nov 18, 2008
    • Afton Chemical Corporation
    • Mark T. Devlin
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricant compositions exhibiting improved demulse performance
    • Patent number 6,255,263
    • Issue date Jul 3, 2001
    • Ethyl Petroleum Additives, Ltd
    • Helen T. Ryan
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Lubricating compositions
    • Patent number 6,184,186
    • Issue date Feb 6, 2001
    • Ethyl Petroleum Additives, Ltd
    • Helen T. Ryan
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Hydraulic fluids
    • Patent number 5,767,045
    • Issue date Jun 16, 1998
    • Ethyl Petroleum Additives Limited
    • Helen T. Ryan
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Zinc additives of enhanced performance capabilities
    • Patent number 5,604,188
    • Issue date Feb 18, 1997
    • Ethyl Petroleum Additives Limited
    • Helen T. Ryan
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
  • Information Patent Grant

    Modified dispersant compositions
    • Patent number 5,505,868
    • Issue date Apr 9, 1996
    • Ethyl Petroleum Additives Limited
    • Helen T. Ryan
    • C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...

Patents Applicationslast 30 patents