Patents by Inventor Robert J. Grabenstetter

Robert J. Grabenstetter 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).

  • Method for remineralizing tooth enamel
    Patent number: 4080440
    Abstract: Demineralized tooth enamel is remineralized by first forming a metastable mixture by mixing a solution containing a soluble calcium salt with a solution containing a soluble phosphate salt, the mixture having a pH of from about 2.5 to about 4 and a ratio of calcium ions to phosphate ions of from 0.01 to 100; and second, applying the metastable mixture to the tooth surface. Preferably, the second solution contains a soluble fluoride salt and the metastable mixture has a pH of about 2.7.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: March 21, 1978
    Assignee: The Procter & Gamble Company
    Inventors: David N. DiGiulio, Robert J. Grabenstetter