Patents by Inventor John Kowalchuk

John Kowalchuk 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).

  • Powdered detergent compositions containing a calcium salt of an anionic surfactant
    Patent number: 4162994
    Abstract: The present invention relates to a mechanically mixed, non-spray dried, built laundry detergent composition comprising the calcium salt of a non-soap, organic, anionic surface active agent, an ethoxylated alcohol nonionic surfactant, an alkali-metal salt of a builder compound that precipitates hardness ions in water; and, optionally, calcium carbonate as a crystallization seed.
    Type: Grant
    Filed: November 10, 1977
    Date of Patent: July 31, 1979
    Assignee: Lever Brothers Company
    Inventor: John Kowalchuk
  • Powdered detergent compositions containing a calcium salt of an anionic surfactant
    Patent number: 4137197
    Abstract: The present invention relates to an improved mechanically mixed, non-spray dried, built laundry detergent composition comprising the calcium salt of a non-soap, organic, anionic surface active agent, an ethoxylated alcohol nonionic surfactant, and an alkali metal salt of a phosphate sequesterant builder compound.
    Type: Grant
    Filed: November 10, 1977
    Date of Patent: January 30, 1979
    Assignee: Lever Brothers Company
    Inventor: John Kowalchuk
  • Clean out drain
    Patent number: D877864
    Type: Grant
    Filed: May 4, 2018
    Date of Patent: March 10, 2020
    Inventor: John Kowalchuk