Patents by Inventor Colin W. Johnston

Colin W. Johnston 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).

  • Discharge lamp with high color temperature
    Patent number: 7486026
    Abstract: A lamp includes a discharge sustaining fill which includes cesium halide, one of indium halide and thallium halide, optionally gadolinium halide and a rare earth halide component selected from dysprosium halide, holmium halide, thulium halide, and neodymium halide. In operation without a jacket, the lamp may have a color temperature of from 7,000K to 14,000K and a color rendering index of at least 70 when operated at an arc wall loading in excess of about 2 W/mm2.
    Type: Grant
    Filed: November 9, 2006
    Date of Patent: February 3, 2009
    Assignees: General Electric Company, Koto Electric Co., Ltd.
    Inventors: Colin W. Johnston, James A. Leonard, Deeder Aurongzeb, Kazuya Abe, Makoto Kozawa
  • Discharge lamp with high color temperature
    Publication number: 20080111489
    Abstract: A lamp includes a discharge sustaining fill which includes cesium halide, one of indium halide and thallium halide, optionally gadolinium halide and a rare earth halide component selected from dysprosium halide, holmium halide, thulium halide, and neodymium halide. In operation without a jacket, the lamp may have a color temperature of from 7,000K to 14,000K and a color rendering index of at least 70 when operated at an arc wall loading in excess of about 2 W/mm2.
    Type: Application
    Filed: November 9, 2006
    Publication date: May 15, 2008
    Inventors: Colin W. Johnston, James A. Leonard, Deeder Aurongzeb, Kazuya Abe, Makoto Kozawa