Patents by Inventor Robert P. Fellman

Robert P. Fellman 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).

  • Permanent dental restorative material
    Patent number: 4433958
    Abstract: Wear-resistant, high compressive strength permanent dental restorations are prepared from novel compositions comprising (a) a liquid monomer system comprised of one or more monoethylenically unsaturated monomers and one or more polyethylenically unsaturated monomers, (b) a solid particulate system insoluble in the liquid monomer system (a) comprised of a mixture of both organic and inorganic particulate substances, and (c) a free radical initiator system.
    Type: Grant
    Filed: August 26, 1982
    Date of Patent: February 28, 1984
    Assignee: Rohm and Haas Company
    Inventors: Robert P. Fellman, Marvin J. Hurwitz, Robert M. Myers, Gerald F. Slack