Patents by Inventor Jacob Vermeule

Jacob Vermeule 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).

  • Lubricating oil composition
    Patent number: 4929374
    Abstract: Lubricating oil composition comprising a lubricating base oil, one or more overbased alkaline earth metal salts of an aromatic carboxylic acid, a succinimide derivative being the reaction product of a hydrocarbyl-substituted succinic anhydride and an amine, and an anti-gelling agent which has been selected from a polyalkoxylated alcohol and an alkanolamine derivative.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: May 29, 1990
    Assignee: Shell Oil Company
    Inventors: Feike De Jong, Willem Dannenberg, Jacob Vermeule
  • Phosphorylation of alcohols
    Patent number: 4832807
    Abstract: Phosphorylation of alcohols by contacting the alcohol with a phosphorous sulphide under the impact of ultrasound. The phosporylated produce can be converted into a metal salt, which is a suitable anti-wear additive for lubricating oils.
    Type: Grant
    Filed: July 31, 1987
    Date of Patent: May 23, 1989
    Assignee: Shell Oil Company
    Inventors: Feike De Jong, Jacob Vermeule
  • Lubricating oil compositions
    Patent number: 4715973
    Abstract: Lubricating oil compositions, prepared by the addition of at least one basic salts comprising polyvalent metal salt of naphthenic acids to at least one hydrocarbon lubricating oil, are stabilized above 140.degree. C. by the addition of at least one polyester, or salt of said polyester. The polyesters lead to marked improvement in stability even when used in low concentrations.
    Type: Grant
    Filed: January 30, 1986
    Date of Patent: December 29, 1987
    Assignee: Shell Oil Company
    Inventors: Feike de Jong, Jacob Vermeule