Patents by Inventor Kirk Emerson Davis

Kirk Emerson Davis 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).

  • Sulfurized compositions
    Patent number: 4119549
    Abstract: Sulfurized compositions are prepared by the reaction of unsaturated compounds and a mixture of sulfur and hydrogen sulfide under superatmospheric pressure and in the presence of a catalyst, followed by removal of low boiling materials. They are useful as lubricant additives.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: October 10, 1978
    Assignee: The Lubrizol Corporation
    Inventor: Kirk Emerson Davis
  • Sulfurized compositions
    Patent number: 4119550
    Abstract: Sulfurized compositions are prepared by the reaction of unsaturated compounds and a mixture of sulfur and hydrogen sulfide under superatmospheric pressure, followed by removal of low boiling materials. They are useful as lubricant additives.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: October 10, 1978
    Assignee: The Lubrizol Corporation
    Inventors: Kirk Emerson Davis, Thomas Frederick Holden
  • Sulfurized Mannich condensation products and fuel compositions containing same
    Patent number: 4090854
    Abstract: Sulfurized Mannich condensation products, made from phenolic compounds, aldehydes and amines, which have been further treated with elemental sulfur are improved additives for lubricants and normally liquid fuels.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: May 23, 1978
    Assignee: The Lubrizol Corporation
    Inventor: Kirk Emerson Davis
  • Method of preparing primary aliphatic mercaptans
    Patent number: 4002686
    Abstract: Primary aliphatic (preferably alkyl) mercaptans are prepared by heating a phosphorus-sulfur compound, preferably a primary aliphatic phosphorodithioic acid, with a basic nitrogen compound. The preferred basic nitrogen compounds are amines and particularly aliphatic primary and secondary amines, especially alkylene polyamines.
    Type: Grant
    Filed: August 5, 1975
    Date of Patent: January 11, 1977
    Assignee: The Lubrizol Corporation
    Inventors: Kirk Emerson Davis, Emil Thomas Wierber