Patents by Inventor Rolf Daur

Rolf Daur 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).

  • Soldering to a gold member
    Patent number: 4268585
    Abstract: A method of applying solder to gold by applying a gold-tin intermediate layer to the gold and applying the solder over at least a portion of the intermediate layer. The method can be employed to produce a printed circuit unit composed of a printed circuit board, at least one gold member mounted on the board, a gold-tin intermediate layer bonded to at least a portion of the gold member, and solder bonded onto the intermediate layer.
    Type: Grant
    Filed: June 1, 1978
    Date of Patent: May 19, 1981
    Assignee: Licentia Patent-Verwaltungs-G.m.b.H.
    Inventors: Rolf Daur, Herbert Hoffmann, Gunter Schmid