Patents by Inventor Stephen Berndanner

Stephen Berndanner 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).

  • Short arc high-pressure discharge lamp
    Patent number: 7279839
    Abstract: A short arc high-pressure discharge lamp (1) for dc operation, includes a discharge vessel (2) that has two necks (4) diametrically opposite each other, in which an anode (26) and a cathode (7) made of tungsten are melted in a gastight manner, and which has a filling made of at least one noble gas and possibly mercury. According to the invention, at least the material of the cathode tip (11) contains lanthanum oxide La2O3 and at least another oxide from the group consisting of hafnium oxide HfO2 and zirconium oxide ZrO2 in addition to the abovementioned tungsten.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: October 9, 2007
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Lars Menzel, Dietmar Ehrlichmann, Thomas Mehr, Stephen Berndanner, Wolfgang Spielmann, Gerhard Leichtfried