Patents by Inventor Joerg Konetzka

Joerg Konetzka 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).

  • Pasty dental veneer making composition
    Patent number: 5183834
    Abstract: A heat cured pasty composition adapted to form a dental veneer which is resistant or immune to interdental cracks while in use on crowns and bridges. The composition includes polymerizable urethane-acrylic monomer, inorganic fillers, pyrogenic silica, heat activated polymerization initiators, and fractured organic filler particles. Heat polymerization of the composition above about 100.degree. C. forms a polymer which has a microhardness of at least HV 0.1/10 18.0 Kp/mm.sup.2, and an impact strength of at least 2.0 KJ/m.sup.2.
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: February 2, 1993
    Assignee: Dentsply G.m.b.H.
    Inventors: Karl J. Gorlich, Fritz U. Bauer, Joerg Konetzka