Patents by Inventor Wolfgang Kuerten

Wolfgang Kuerten 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).

  • Tarnish-resistant precious-metal alloys for dentistry
    Patent number: 4909985
    Abstract: Economical, tarnish-resistant precious-metal alloys for dentistry consisting essentially of 36 to 39% silver, 28 to 32.5% gold, 17 to 19.5% palladium, 0 to 0.1% iridium, 9.5 to 10.5% copper, 0.5 to 3% indium and 0.5 to 2.5% zinc, whereby the sum of the indium and zinc contents does not exceed a maximum of 4%.
    Type: Grant
    Filed: June 2, 1989
    Date of Patent: March 20, 1990
    Assignee: Degussa Aktiengesellschaft
    Inventors: Rudolf Kropp, Wolfgang Kuerten