Patents by Inventor Frederic Koury

Frederic Koury 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 arc discharge lamp having coiled coil electrodes
    Patent number: 4277714
    Abstract: An electrode for a metal halide arc discharge lamp comprises a coiled coil on a tungsten rod, the rod diameter being equal to W.sup.0.56 /0.784 mils, where W is the input power to the lamp in watts. The primary wire for the coiled coil equals D.sup.1.8 /80.8, where D is the rod diameter in mils, and is equal to half the diameter of the mandrel wire of the coiled coil.
    Type: Grant
    Filed: July 2, 1979
    Date of Patent: July 7, 1981
    Assignee: GTE Products Corporation
    Inventors: William M. Keeffe, Frederic Koury, W. Calvin Gungle
  • High pressure mercury vapor discharge lamp having improved electrodes
    Patent number: 4044276
    Abstract: The emitter material on the electrode of a high intensity discharge lamp comprises hafnium oxide, barium oxide and calcium oxide.
    Type: Grant
    Filed: April 9, 1976
    Date of Patent: August 23, 1977
    Assignee: GTE Sylvania Incorporated
    Inventors: William M. Keeffe, Frederic Koury
  • High pressure electric discharge device with hafnium getter
    Patent number: 3946262
    Abstract: A thin foil of hafnium or a hafnium alloy is disposed within a high pressure metal halide discharge lamp for selectively gettering any hydrogen contaminant within the lamp. In one embodiment a long strip of hafnium foil is welded along the current return wire which extends from the remote end of the arc tube to the base of the lamp, while in another embodiment, bowed-out strips are welded to support straps on each of the arc tube press seals. In this manner, a significant portion of the hafnium getter is disposed in a location where it is subjected to operating temperatures lower than about 330.degree.C.
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: March 23, 1976
    Assignee: GTE Sylvania Incorporated
    Inventors: William M. Keeffe, Frederic Koury