Patents by Inventor Peter J. Kohler

Peter J. Kohler 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).

  • Polymerizable dental material
    Patent number: 5228907
    Abstract: Radiopaque, abrasion-resistant tooth fillings and inlays that can be polished to a high gloss can be made from a dental material that, in addition to monomeric dimethacrylates, contains a filler mixture of 80 to 90 weight % barium aluminum silicate glass, having a mean particle size of 0.5 to 1.5 .mu.m, and 10 to 20 % weight silicon dioxide, having a mean particle size of 0.04 to 0.06 .mu.m. The dental material is also suitable for anchoring dental prostheses.
    Type: Grant
    Filed: November 7, 1991
    Date of Patent: July 20, 1993
    Assignee: Heraeus Kulzer GmbH
    Inventors: Regina Eppinger, Bernhard Eppinger, Detlef Heindl, Peter J. Kohler, Joachim Fritze