Patents by Inventor Kurt Heilmann

Kurt Heilmann 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).

  • Gold alloy wire for jewelry chains
    Patent number: 4297416
    Abstract: Gold alloy wire for the production of jewelry, especially jewelry chains, is made of a gold solder containing nucleus and a jacket of a gold alloy wherein the solder containing nucleus has a core of fine gold which is surrounded by a layer of a ductile, lower melting gold solder alloy.
    Type: Grant
    Filed: June 13, 1979
    Date of Patent: October 27, 1981
    Assignee: Ferd. Wagner
    Inventors: Hans Krug, Kurt Heilmann
  • Silver alloy wire for jewelry chains
    Patent number: 4247602
    Abstract: Silver alloy wire for the production of jewelry, especially jewelry chains is made of a solder containing nucleus and a jacket of silver or silver alloy wherein the solder containing nucleus has a core of silver or silver alloy surrounded by a layer of brass.
    Type: Grant
    Filed: June 13, 1979
    Date of Patent: January 27, 1981
    Assignee: Ferd. Wagner
    Inventors: Hans Krug, Kurt Heilmann