Patents by Inventor David B. Guthrie

David B. Guthrie has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Organic liquids containing anti-static agents which are copolymers of alpha-olefins and maleic anhydrides reacted with amines
    Patent number: 4163645
    Abstract: This invention relates to copolymers of alpha-olefins and maleic anhydride reacted with amines in the presence of Lewis acids, preferably BF.sub.3 or a complex thereof; and to the use of these products as anti-static agents in organic liquids, preferably in hydrocarbons. The use of Lewis acid produces a unique reaction product which is superior as to fluidity and/or anti-static properties as compared to the corresponding product produced without Lewis acid. In addition, the use of Lewis acid promotes the rate of reaction thus reducing reaction time.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: August 7, 1979
    Assignee: Petrolite Corporation
    Inventors: William J. Cheng, David B. Guthrie
  • Preparation of magnesium-containing dispersions from magnesium carboxylates at low carboxylate stoichiometry
    Patent number: 4163728
    Abstract: This invention relates to stable, fluid magnesium-containing dispersions and the preparations thereof by the high temperature decomposition of Magnesium salts of carboxylic acids to MgO in a dispersant-containing fluid, where less than a stoichiometric amount of carboxylic acid is employed in forming the magnesium carboxylates, based on Mg(OH).sub.2 or equivalent.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: August 7, 1979
    Assignee: Petrolite Corporation
    Inventors: William J. Cheng, David B. Guthrie
  • Clear, bright oil-soluble aluminum-containing compositions
    Patent number: 4123231
    Abstract: This invention relates to the preparation of clear, bright oil-soluble aluminum-containing compositions of high aluminum content; to the resulting products; and to the use of such products; for example, as fuel additives such as additives employed in turbine fuels as corrosion inhibitors and other uses.
    Type: Grant
    Filed: February 4, 1977
    Date of Patent: October 31, 1978
    Assignee: Petrolite Corporation
    Inventors: David B. Guthrie, Donald M. Leiendecker
  • Copolymers of alpha-olefins and maleic anhydride reacted with amines in the presence of Lewis acids
    Patent number: 4121026
    Abstract: This invention relates to copolymers of alpha-olefins and maleic anhydride reacted with amines in the presence of Lewis acids, preferably BF.sub.3 or a complex thereof; and to the use of these products as anti-static agents in organic liquids, preferably in hydrocarbons. The use of Lewis acid produces a unique reaction product which is superior as to fluidity and/or anti-static properties as compared to the corresponding product produced without Lewis acid. In addition, the use of Lewis acid promotes the rate of reaction thus reducing reaction time.
    Type: Grant
    Filed: March 23, 1973
    Date of Patent: October 17, 1978
    Assignee: Petrolite Corporation
    Inventors: William J. Cheng, David B. Guthrie