Patents by Inventor Martin Wurtenberger

Martin Wurtenberger 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).

  • Method of coloring cut gemstones
    Patent number: 7033640
    Abstract: A method of coloring cut gemstones introduces metals or metal oxides into a surface layer by means of heat treatment. During the heat treatment the gemstones are laid on a solid plate and the metals or metal oxides form a substantial constituent of the plate. The surface of the gemstone is protected from direct content with the metals and metal oxides in the plate by a layer containing non-coloring oxides.
    Type: Grant
    Filed: December 12, 2002
    Date of Patent: April 25, 2006
    Assignee: D. Swarovski & Co
    Inventors: Thomas Rauch, Martin Würtenberger
  • Method of coloring cut gemstones
    Publication number: 20030124299
    Abstract: A method of coloring cut gemstones by introducing metals or metal oxides into a surface layer by means of heat treatment, wherein in the heat treatment the gemstones are laid on a solid plate and the metals or metal oxides form a substantial constituent of the plate.
    Type: Application
    Filed: December 12, 2002
    Publication date: July 3, 2003
    Inventors: Thomas Rauch, Martin Wurtenberger