Patents by Inventor Curtis R. Petersen

Curtis R. Petersen 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).

  • Lanolin containing metalworking fluids and concentrates
    Patent number: 4787995
    Abstract: Lanolin emulsions and lanolin containing concentrates for water-based metalworking fluids are disclosed. The lanolin metalworking fluids contain water, lanolin, fatty acids, amines and nonionic surfactants. The compositions are stable in hard water.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: November 29, 1988
    Assignee: Chem-Trend, Incorporated
    Inventors: Daniel R. Nichols, Curtis R. Petersen
  • Thickener compositions for water-based hydraulic and metalworking fluid compositions
    Patent number: 4636326
    Abstract: Thickener compositions, hydraulic fluid and metalworking fluid concentrates, aqueous concentrates and water-based hydraulic fluid and metalworking fluid or lubricant compositions are thickened to an oil-like viscosity by a low solids combination of thickeners. The combination of thickeners consists of at least one polyurethane and at least one dimer ester.
    Type: Grant
    Filed: December 12, 1984
    Date of Patent: January 13, 1987
    Assignee: S. C. Johnson & Son, Inc.
    Inventors: Paul M. Hernandez, Curtis R. Petersen
  • Cell phone cover with sun shade
    Patent number: D807869
    Type: Grant
    Filed: November 25, 2015
    Date of Patent: January 16, 2018
    Inventor: Curtis R. Petersen