Patents by Inventor Pieter Cornelis Ooms

Pieter Cornelis Ooms 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 improved auxiliary amalgam
    Patent number: 6707246
    Abstract: A low-pressure mercury vapor discharge lamp is provided with a discharge vessel (10). The discharge vessel comprises tubular end portions (11; 11′), which each have a longitudinal axis (12; 12′). The discharge vessel (10) encloses a discharge space (18) containing a filling of mercury and an inert gas in a gastight manner. Electrodes (20; 20′) are arranged in the discharge space (18). An auxiliary amalgam is provided on a carrier (25; 25′) in the proximity of the electrodes (20; 20′). According to the invention, a part of the carrier (25; 25′) is arranged in a plane transverse to the longitudinal axis (12; 12′). Preferably, a stem (21; 21′) in the tubular end portion (11; 11′) carries, apart from the electrode (20; 20′), a support in the form of a wire (23; 23′) or an extended exhaust tube, which support carries the carrier (25; 25′). In an alternative embodiment, the carrier is clamped directly onto the stem.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: March 16, 2004
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Willem Johannes Van Den Bogert, Hindrik Hermannus Stel, Johannes Theodorus Jacobus Van Haastrecht, Jeroen Jan Wits, Ronald Arjan Van Den Brakel, Pieter Cornelis Ooms, Cornelis De Putter