Patents by Inventor Klaus Kretzschmar

Klaus Kretzschmar 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).

  • Method for the manufacture of epoxy resin molding materials
    Patent number: 4528358
    Abstract: Molding materials, laminates, stratified material and cover or protective layers which are of high electrical and mechanical quality are formed from polymerisable epoxy compounds if the corss-linking of the epoxy resins is accomplished by anionic polymerisation, using mixed catalysts of tertiary amines of the formula: ##STR1## and an imidazoles of the formula: ##STR2## as a polymerisation catalysts.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: July 9, 1985
    Assignee: Siemens Aktiengesellschaft
    Inventors: Wolfgang Kleeberg, Klaus-Robert Hauschildt, Heinz Hacker, Klaus Kretzschmar