Patents by Inventor Jeroen C. Langevoort

Jeroen C. Langevoort 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).

  • Low-pressure discharge lamp having hollow electrodes
    Patent number: 5675214
    Abstract: The low-pressure discharge lamp is discolsed having a lamp vessel into which hollow cylindrical electrodes enter, between which a discharge path extends. At least one of the electrodes has a tube at a distance from an end thereof, the tube extending in the discharge path. The tube is connected to the electrode by electrically conductive means and is coated with electron emissive material. The surface area of the material of the means in cross-section is at most 25% of the surface area of the material of the electrode in cross-section.
    Type: Grant
    Filed: September 19, 1995
    Date of Patent: October 7, 1997
    Assignee: U.S. Philips Corporation
    Inventors: Andreas S. G. Geven, Jeroen C. Langevoort, Henricus L. A. A. Vogels, Patricius W. M. Lepelaars, Hui-Meng Chow