Patents by Inventor Harald Ludwig Witting

Harald Ludwig Witting 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).

  • Electrodeless high intensity discharge lamps
    Patent number: 5952784
    Abstract: An electrodeless high intensity discharge lamp includes a light-transmissive arc tube for containing a plasma arc discharge, the arc tube having a top and a bottom and a side wall with a fill disposed therein. The fill includes at least one metal halide and a buffer gas. The arc tube has a wall with an interior surface having an annular region around the central extent of the side wall. The interior surface of the arc tube wall is smooth over the majority of its extent but has a liquid-stabilizing roughened surface in the annular region.
    Type: Grant
    Filed: August 28, 1998
    Date of Patent: September 14, 1999
    Assignee: General Electric Company
    Inventor: Harald Ludwig Witting