Patents by Inventor Johannes J. F. Geijtenbeek

Johannes J. F. Geijtenbeek 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).

  • Metal halide lamp with lithium and cerium iodide
    Patent number: 6525476
    Abstract: Metal halide lamp includes a discharge vessel having a ceramic wall with an internal diameter Di and enclosing two electrodes whose tips are a distance EA apart, wherein EA/Di>5. The vessel has a filling comprising Hg, CeI, and LiI.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: February 25, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Johannes J. F. Geijtenbeek, Fransiscus A. Vermeulen
  • Metal-halide lamp with lithium and cerium iodide
    Patent number: 6147453
    Abstract: Metal halide lamp includes a discharge vessel having a ceramic wall with an internal diameter Di and enclosing two electrodes whose tips are a distance EA apart, wherein EA/Di>5. The vessel has a filling comprising Hg, CeI, and LiI.
    Type: Grant
    Filed: November 19, 1998
    Date of Patent: November 14, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Johannes J. F. Geijtenbeek, Fransiscus A. Vermeulen
  • Ceramic metal halide discharge lamp with NaI/CeI.sub.3 filling
    Patent number: 5973453
    Abstract: Metal halide lamp with ceramic discharge vessel having electrodes with spacing EA, internal diameter Di, and EA/Di>5. Ionizable filling comprises NaI and CeI.sub.3, and a coldest spot temperature of 1100-1500 K is achieved.
    Type: Grant
    Filed: December 2, 1997
    Date of Patent: October 26, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Johannes A. J. M. Van Vliet, Johannes J. F. Geijtenbeek