Patents by Inventor John G. David

John G. David 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).

  • Fabric conditioning materials
    Patent number: 4427558
    Abstract: Particles for softening fabrics either in a wash liquor or in the rinse, are formed from a liquid mixture comprising water, a cationic material, such as a quaternary ammonium compound, urea and a calcium soap. The particles are formed from the liquid mixture by cooling to a solid and then grinding or by spray cooling. Weathering to form a crisp free flowing powder is optional. The presence of water in the liquid mixture improves the processing of the particles.
    Type: Grant
    Filed: April 26, 1982
    Date of Patent: January 24, 1984
    Assignee: Lever Brothers Company
    Inventor: John G. David