Patents by Inventor Philip C. Waterfield

Philip C. Waterfield 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).

  • Dentrifice compositions
    Patent number: 5258173
    Abstract: The present invention relates to a dentifrice composition comprising a stannous compound that releases stannous ions in the composition such as stannous fluoride or stannous pyrophosphate. These stannous ions can be converted in the composition into the inactive stannic ions, and to prevent such conversion according to the present invention an antioxidant is incorporated into the composition, such as butylated hydroxyanisole, butylated hydroxytoluene and ethyl vanillin.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: November 2, 1993
    Assignee: Chesebrough-Pond's USA Co., Division of Conopco, Inc.
    Inventor: Philip C. Waterfield