Patents by Inventor Robert Hargitt Culbertson

Robert Hargitt Culbertson 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).

  • Denture adhesives with mixed salts of alkyl vinyl ether-maleic copolymer or terpolymer
    Patent number: 6617374
    Abstract: The present invention relates to a denture adhesive composition comprising mixed salts of an alkyl vinyl ether-maleic acid or anhydride copolymer and/or terpolymer with isobutylene wherein the mixed salt contains a cationic salt function comprising at least about 22.5% calcium cations, from about 15% to about 25% of zinc cations, of the total initial carboxyl groups reacted, the mixed salt containing from about 36% to about 50% free acid component. In addition the present invention relates to denture adhesive compositions comprising the above composition and at least one non-adhesive self-supporting layer. The present invention further relates to a method of increasing the adhesion of dentures to the oral cavity by applying the above compositions to dentures, directly to the oral cavity, palate or ridge of the oral cavity, or applying it to both, and thereafter securing the denture to the ridge or palate of the oral cavity.
    Type: Grant
    Filed: September 2, 1999
    Date of Patent: September 9, 2003
    Assignee: The Procter & Gamble Company
    Inventors: Jayanth Rajaiah, Carole Ann Schumacher, John Roy Whitney, Kimberly Ann Gilday-Weber, Robert Hargitt Culbertson