Patents by Inventor Klaus-Peter Thomas

Klaus-Peter Thomas 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).

  • Precipitated silicas which contain an active substance
    Patent number: 6214383
    Abstract: A precipitated silica which contains an active substance with a characteristic, delayed release of active substance is prepared by adding the active substance during preparation of the precipitated silica. The precipitated silica containing the active substance may be added to oral hygiene agents such as toothpastes, topical fluoride preparations, dental materials or medicinal chewing gums.
    Type: Grant
    Filed: December 10, 1998
    Date of Patent: April 10, 2001
    Assignee: Degussa-Huls AG
    Inventors: Heinz Esch, Robert Kuhlmann, Matthias Neumüller, Karin Otto, Ralf Rausch, Klaus-Peter Thomas