Patents by Inventor Bauke Sieswerda

Bauke Sieswerda 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 mercury vapor discharge lamp
    Patent number: 4546284
    Abstract: A low-pressure mercury vapor discharge lamp having a lamp envelope (1) which encloses a folded tubular discharge vessel (2), the discharge vessel being provided with an appendix (6) which is kept at a relatively low temperature by a heat shield (7) located within the lamp envelope. The heat shield shields the outer wall surface of the appendix from the outer wall of the discharge vessel. The cooler appendix serves to maintain the mercury vapor pressure at an optimum value during operation of the lamp.
    Type: Grant
    Filed: October 17, 1979
    Date of Patent: October 8, 1985
    Assignee: U.S. Philips Corporation
    Inventors: Max L. P. Renardus, Bauke Sieswerda