Patents by Inventor Janice T. Karlotski

Janice T. Karlotski 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).

  • Mercury free discharge lamp with zinc iodide
    Patent number: 6853140
    Abstract: A compact fused silica, electroded HID lamp for automotive forward lighting, which contains no mercury. The lamps voltage, approximately 40 volts, is developed in this lamp by vaporizing zinc iodide instead of mercury. A compromise between voltage and luminous flux is achieved through the choice of the sodium scandium (Na:Sc) molar ratio, between 4.5:1 and 6:1 and a zinc iodide (ZnI2) dose of 2 to 6 micrograms per cubic millimeter that permits the lamp to operate within the North America, European and Japanese automotive color specifications for white light. The voltage in the lamp can be controlled according to the zinc iodide doping level without seriously impacting the visible spectrum otherwise provided by the other known dopants in the lamp.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: February 8, 2005
    Assignee: Osram Sylvania Inc.
    Inventors: Walter P. Lapatovich, Sharon L. Ernest, Susan L. Callahan, Janice T. Karlotski, Robert J. Karlotski
  • Mercury free discharge lamp with zinc iodide
    Publication number: 20030189408
    Abstract: A compact fused silica, electroded HID lamp for automotive forward lighting, which contains no mercury. The lamps voltage, approximately 40 volts, is developed in this lamp by vaporizing zinc iodide instead of mercury. A compromise between voltage and luminous flux is achieved through the choice of the sodium scandium (Na:Sc) molar ratio, between 4.5:1 and 6:1 and a zinc iodide (ZnI2) dose of 2 to 6 micrograms per cubic millimeter that permits the lamp to operate within the North America, European and Japanese automotive color specifications for white light. The voltage in the lamp can be controlled according to the zinc iodide doping level without seriously impacting the visible spectrum otherwise provided by the other known dopants in the lamp.
    Type: Application
    Filed: September 12, 2002
    Publication date: October 9, 2003
    Inventors: Walter P. Lapatovich, Sharon Ernest, Susan L. Callahan, Robert J. Karlotski, Janice T. Karlotski