Patents by Inventor Dieter Frembs

Dieter Frembs 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).

  • Gold polish preparation
    Patent number: 4780502
    Abstract: A water compatible gold polish preparation is described containing gold compounds, organic carriers and flux materials wherein the organic carrier mixture is formed of 50 to 100% of 1 or more N-substituted -2-pyrrolidones and 0 to 50% of one or more water dilutable synthetic resins.
    Type: Grant
    Filed: December 3, 1986
    Date of Patent: October 25, 1988
    Assignee: Degussa Aktiengesellschaft
    Inventors: Marion Lotze, Dieter Frembs