Patents by Inventor Antonius J. A. van Stratum

Antonius J. A. van Stratum 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: 4288715
    Abstract: Low-pressure mercury vapor discharge lamp having in the discharge vessel a vapor pressure-controlling mercury amalgam which is secured to the inner surface of a wall of a container which is provided with an opening to the discharge vessel. Such securing reduces the risk that small portions of the amalgam might become dislodged by vibration or shock and escape from the container into the discharge vessel. The amalgam is secured to the container wall by fusion thereto by means of an intermediate "wetting" agent formed by a thin layer of nickel.
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: September 8, 1981
    Assignee: U.S. Philips Corporation
    Inventors: Johan B. J. van Overveld, Auke G. van der Kooi, Antonius J. A. van Stratum