Patents Represented by Attorney, Agent or Law Firm Dicran Halaian
  • 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