Patents by Inventor Stephan Offermanns

Stephan Offermanns 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).

  • High pressure gas discharge lamp
    Patent number: 5113119
    Abstract: An electrodeless high pressure discharge lamp contains a halide or oxyhalide of W, Ta, Re, or rhenium oxide in such a quantity that a supersaturated metal vapor arises in the discharge, by which metal particles are formed. Owing to their high temperature these particles generate thermal emission. The lamp has a high color temperature and a high color rendering index.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: May 12, 1992
    Assignee: U.S. Philips Corporation
    Inventors: Ulrich Niemann, Stephan Offermanns, Bernhard Weber