Patents by Inventor Donald G. Foulke

Donald G. Foulke 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).

  • Sulfite gold plating bath and process
    Patent number: 3990954
    Abstract: Disclosed is an improved electroplating bath and process for obtaining semi-bright to bright electrodeposits of gold and gold alloys. The electroplating bath contains a gold sulfite complex and a nitrogen-free diphosphonic compound having at least two phosphonic groups attached directly to a carbon atom. Presence of the nitrogen-free phosphonate compound enhances the stability of the gold sulfite baths and improves the brightness of electrodeposits obtained therefrom.
    Type: Grant
    Filed: December 17, 1973
    Date of Patent: November 9, 1976
    Assignee: Oxy Metal Industries Corporation
    Inventors: Donald G. Foulke, John M. Deuber