Patents by Inventor Dahsehn Yu

Dahsehn Yu 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).

  • Anticalculus dentifrice composition containing highly soluble pyrophosphate
    Patent number: 5811079
    Abstract: An anticalculus dentifrice composition containing an antimicrobially effective amount of an antimicrobial agent selected from the group consisting of thymol, eucalyptol, methyl salicylate and mixtures thereof, and a pyrophosphate ion in an amount from about 0.1% to less than about 1.5% by weight of the composition, the pyrophosphate ion being derived from a highly soluble alkali metal pyrophosphate salt. The composition exhibits both antimicrobial and anticalculus efficacy at low levels of pyrophosphate ion even in the substantial absence of anticalculus enhancing agents.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: September 22, 1998
    Assignee: Warner-Lambert Company
    Inventors: Dahsehn Yu, Anil K. Talwar, D. Scott Harper, Dhananjaya Alli