Patents by Inventor Luke A. Schaap

Luke A. Schaap 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).

  • Anti-wear engine and lubricating oil
    Patent number: 5143634
    Abstract: An engine and lubricating oil having superior anti-wear properties without necessitating use of phosphorus-containing anti-wear additives is provided which is particularly useful in automotive, industrial, and gear lubricants. The anti-wear engine and lubricating oil comprises an anti-wear component including benzotriazole or the reaction product of benoztriazole, combined with a formaldehyde-containing component and at least one primary or secondary aliphatic amine, a sulfur-containg compound, a metallic component, and a lubricating base oil.
    Type: Grant
    Filed: January 17, 1991
    Date of Patent: September 1, 1992
    Assignee: Amoco Corporation
    Inventors: Elaine M. Quinga, Luke A. Schaap
  • Low viscosity oils
    Patent number: 4282106
    Abstract: An improved low viscosity (i.e.) 5 W to 71/2 W engine oil resistant to oxidation and consumption comprising a major portion of a lubricating oil stock, a sulfurized oil, a dispersant, an anti-corrosion agent, an anti-rust agent, a detergent, an anti-oxidant, and a viscosity index improver.
    Type: Grant
    Filed: October 5, 1979
    Date of Patent: August 4, 1981
    Assignee: Standard Oil Company (Indiana)
    Inventors: Luke A. Schaap, John H. Udelhofen, Samuel W. Harris