Patents by Inventor Werner Huth

Werner Huth 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).

  • Alkaline bath for the electrolytic deposition of low carat yellow colored gold alloy layers
    Patent number: 4358351
    Abstract: For the production of low carat rose to gold colored gold alloy coatings there are needed electrolytic baths containing soluble gold cyanide, soluble copper cyanide, potassium carbonate or potassium bicarbonate which produce corrosion resistant coatings of 13-18 carats and no physiologically hazardous cadmium. The baths of the present invention contain, in place of cadmium, 7.5 to 40 grams/liter of zinc as complex zinc cyanide.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: November 9, 1982
    Assignee: Degussa Aktiengesellschaft
    Inventors: Franz Simon, Werner Huth, Bernd Dorbath, Wolfgang Zilske