Patents by Inventor Cornelis J. M. Denissen

Cornelis J. M. Denissen 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 ceramic electrode shield
    Patent number: 6525473
    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 an inert gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. An electrode shield (22a) encompasses at least one of the electrodes (20a) and is made from a ceramic material. Preferably, the electrode shield (22a) is tubular in shape with a lateral slit directed towards the discharge space. The lamp according to the invention has a comparatively low mercury consumption.
    Type: Grant
    Filed: November 5, 2001
    Date of Patent: February 25, 2003
    Assignee: Koninklijke Phillips Electronics N.V.
    Inventors: Cornelis J. M. Denissen, Cornelis R. Ronda, Wilhelmus M. P. Van Kemenade, Henricus P. M. Gubbels
  • Low pressure mercury vapor discharge lamp with ceramic electrode shield
    Publication number: 20020074942
    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 an inert gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. An electrode shield (22a) encompasses at least one of the electrodes (20a) and is made from a ceramic material. Preferably, the electrode shield (22a) is tubular in shape with a lateral slit directed towards the discharge space. The lamp according to the invention has a comparatively low mercury consumption.
    Type: Application
    Filed: November 5, 2001
    Publication date: June 20, 2002
    Applicant: U.S. PHILIPS CORPORATION
    Inventors: Cornelis J.M. Denissen, Cornelis R. Ronda, Wilhelmus M.P. Van Kemenade, Henricus P.M. Gubbels
  • Low-pressure mercury vapor discharge lamp with electrode shield
    Patent number: 6359385
    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 an inert gas in a gastight manner. Each end portion (12a) supports an electrode (20a) arranged in the discharge space. An electrode shield (22a) encompasses at least one of the electrodes (20a) and is made from a ceramic material. Preferably, the electrode shield (22a) is tubular in shape with a lateral slit directed towards the discharge space.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: March 19, 2002
    Assignee: U.S. Philips Corporation
    Inventors: Cornelis J. M. Denissen, Cornelis R. Ronda, Wilhelmus M. P. Van Kemenade, Henricus P. M. Gubbels
  • 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