Patents by Inventor William T. Doran

William T. Doran 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).

  • Prebrushing pyrophosphate-containing liquid oral compositions
    Patent number: 5338538
    Abstract: A stable liquid oral prebrushing composition for loosening and removing plaque present on dental surfaces has a pH of about 7.2 to about 7.9 and comprises dialkali metal pyrophosphate salts, tetraalkali metal pyrophosphate salts or mixtures thereof, together with sodium lauryl sulfate in amounts effective for removal of plaque when the composition is applied to dental surfaces.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: August 16, 1994
    Assignee: Pfizer Inc
    Inventors: Robert E. Tricca, William T. Doran, Catherine L. Gray
  • Nit comb
    Patent number: D336540
    Type: Grant
    Filed: July 11, 1990
    Date of Patent: June 15, 1993
    Assignee: Pfizer Inc.
    Inventor: William T. Doran
  • Nit comb
    Patent number: D353225
    Type: Grant
    Filed: August 7, 1991
    Date of Patent: December 6, 1994
    Assignee: Pfizer Inc.
    Inventors: William T. Doran, Janet H. Merrill, Athanasios S. Ladas