Patents by Inventor Heinz Emmenegger

Heinz Emmenegger 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).

  • Bath for electrolytic deposition of a gold-copper-zinc alloy
    Patent number: 4980035
    Abstract: The bath for electrolytic deposition of an Au-Cu-Zn alloy contains cyanide complexes of Au, of Cu and of Zn, a surface-active agent and a soluble Te and/or Bi salt. It may also contain a non-cyanide organic Zn complex, and a conductive salt and/or alkali metal or ammonium cyanide.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: December 25, 1990
    Assignee: Engelhard Corporation
    Inventor: Heinz Emmenegger
  • Gold alloys and galvanic bath for the electrolytic deposit thereof
    Patent number: 4687557
    Abstract: A galvanic bath for the electrolytic deposit of gold-based alloys contains a cyanide complex of gold, a cyanide complex of copper, a cyanide complex of cadmium and a cyanide complex of zinc, and at least one complexing agent and one surface-active agent, as well as, if desired, a depolarizing agent and/or an inorganic or organic brightening agent. This bath functions in the presence or in the absence of free cyanide.
    Type: Grant
    Filed: February 24, 1986
    Date of Patent: August 18, 1987
    Inventor: Heinz Emmenegger
  • Solution for electroplating a gold-copper-cadmium alloy
    Patent number: 4486275
    Abstract: A bath and method for electrodepositing gold-copper-cadmium alloys. The electroplating solution contains cadmium ions complexed by a soluble hydroxyalkyl diacetate complexing agent and, in addition, a brightener in the form of a phosphoric ester of a chain of ethylene oxides bonded to an alkyl group, and/or a surfactant in the form of one or a mixture of more than one amidopropyldimethylaminoxides of fatty acids.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: December 4, 1984
    Inventor: Heinz Emmenegger