Patents by Inventor William C. Wertz

William C. Wertz 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).

  • Patent number: 5804543
    Abstract: Disclosed are detergent compositions and methods which are suitable for washing colored fabrics in aqueous washing solution with little or no transfer of dye between fabrics. The compositions utilized comprise certain nil-LAS detersive surfactants, detergent builder and certain selected polymeric dye transfer inhibiting agents. The detersive surfactants used must comprise alkyl ether sulfates and certain types of nonionic surfactants (polyhydroxy fatty acid amides and/or alcohol ethoxylates). The polymeric dye transfer inhibiting agents are polyamine N-oxides such as poly(4-vinylpyridine-N-oxide), i.e., PVNO and/or copolymers of N-vinylpyrrolidone and N-vinylimidazole, i.e., PVPVI.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: September 8, 1998
    Assignee: The Procter & Gamble Company
    Inventors: William C. Wertz, Rajan K. Panandiker
  • Patent number: 5466802
    Abstract: Disclosed are detergent compositions and methods which are suitable for washing colored fabrics in aqueous washing solution with little or no transfer of dye between fabrics. The compositions utilized comprise detersive surfactant, detergent builder, certain selected polymeric dye transfer inhibiting agents and certain selected hydrophilic optical brighteners. The polymeric dye transfer inhibiting agents are polyamine N-oxides such as poly(4-vinylpyridine-N-oxide), i.e., PVNO and/or copolymers of N-vinyipyrrolidone and N-vinylimidazole, i.e., PVPVI. The optical brighteners are selected from certain stilbenedisulfonic acid salts.
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: November 14, 1995
    Assignee: The Procter & Gamble Company
    Inventors: Rajan K. Panandiker, William C. Wertz, Larry J. Hughes