Patents by Inventor Joseph L. G. Suijker

Joseph L. G. Suijker 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).

  • High-pressure metal halide discharge lamp
    Patent number: 6362569
    Abstract: A high-pressure metal halide discharge lamp having a power rating of at most 100 W is provided with a discharge vessel having a translucent ceramic wall with a thickness d of at least 1.2 mm. In the discharge space enclosed thereby, two electrodes are arranged with their electrode tips at a mutual interspacing EA. The discharge vessel contains an ionizable filling comprising at least Na and a halide.
    Type: Grant
    Filed: April 22, 1998
    Date of Patent: March 26, 2002
    Assignee: U.S. Philips Corporation
    Inventors: Christoffel Wijenberg, Peter A. Seinen, Joseph L. G. Suijker
  • Metal-halide lamp with ionizable filling and oxygen dispenser to avoid blackening and extend lamp life
    Patent number: 6362571
    Abstract: A metal-halide lamp including a discharge vessel with a ceramic wall, the discharge vessel enclosing a discharge space which contains an ionizable filling which filling contains halides of Na and Tl in addition to Hg. The ionizable filling also contains Ca and is free from rare-earth halides.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: March 26, 2002
    Assignee: U.S. Philips Corporation
    Inventors: Joseph L. G. Suijker, Marinus C. Raas
  • High-pressure metal-halide lamp that includes a ceramic-carrier oxygen dispenser
    Patent number: 6356016
    Abstract: The invention relates to a high-pressure metal-halide lamp comprising a discharge vessel with an ionizable filling containing Hg, a halide and a rare gas, which vessel includes electrodes with a rod containing substantially W. The lamp, when in operation, maintains a W-halide cycle in the discharge vessel. According to the invention, the discharge vessel contains an oxygen dispenser.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: March 12, 2002
    Assignee: U.S. Philips Corporation
    Inventors: Joseph L. G. Suijker, Marinus C. Raas