Patents by Inventor Bennie J. De Maagt

Bennie J. De Maagt 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 with electrode shield
    Patent number: 6274981
    Abstract: A low-pressure mercury vapor discharge lamp is provided with a discharge vessel and a first and a second end portion (12a). The discharge vessel encloses a discharge space provided with a filling of mercury and a rare gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. An electrode shield (22a) encompasses the electrodes (20a) and is covered with a material which reacts with or forms an alloy with alkaline earth metals, which material is released by the electrode (20a).
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: August 14, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Cornelis R. Ronda, Cornelis J. M. Denissen, Volker U. Weiler, Wilhelm A. Groen, Wilhelmus M. P. Van Kemenade, Bennie J. De Maagt
  • High pressure discharge lamp
    Patent number: 5986405
    Abstract: The high pressure discharge lamp has a discharge vessel (1) mounted in an outer envelope (4) in which an oxygen dispenser (30) is disposed. The oxygen dispenser (30) contains silver oxide and may be disposed at a location where it obtains a temperature of at least 340.degree. C. during operation of the lamp, at which temperature the oxide is decomposed and oxygen is released. The deposit of black coatings originating from hydrocarbon contaminations is thereby prevented.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: November 16, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Bennie J. De Maagt, Claudio Boffito