Patents by Inventor Zeya Krasko

Zeya Krasko 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).

  • Quartz arc tube for a metal halide lamp and method of making same
    Patent number: 6786791
    Abstract: A quartz arc tube for a metal halide lamps and its method of making are described. The quartz arc tube has a cylindrical design which promotes a nearly symmetric longitudinal surface temperature profile during operation. The profile has a maximum temperature of about 900° C. which allows for longer operating life at high average wall loadings.
    Type: Grant
    Filed: September 23, 2003
    Date of Patent: September 7, 2004
    Assignee: Osram Sylvania Inc.
    Inventors: William D. Koenigsberg, Miguel Galvez, Gregory Zaslavsky, Zeya Krasko, Joseph V. Lima
  • Quartz arc tube for a metal halide lamp and method of making same
    Publication number: 20040058616
    Abstract: A quartz arc tube for a metal halide lamps and its method of making are described. The quartz arc tube has a cylindrical design which promotes a nearly symmetric longitudinal surface temperature profile during operation. The profile has a maximum temperature of about 900° C. which allows for longer operating life at high average wall loadings.
    Type: Application
    Filed: September 23, 2003
    Publication date: March 25, 2004
    Inventors: William D. Koenigsberg, Miguel Galvez, Gregory Zaslavsky, Zeya Krasko, Joseph V. Lima
  • Quartz arc tube for a metal halide lamp and method of making same
    Patent number: 6661173
    Abstract: A quartz arc tube for a metal halide lamps and its method of making are described. The quartz arc tube has a cylindrical design which promotes a nearly symmetric longitudinal surface temperature profile during operation. The profile has a maximum temperature of about 900° C. which allows for longer operating life at high average wall loadings.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: December 9, 2003
    Assignee: Osram Sylvania Inc.
    Inventors: William D. Koenigsberg, Miguel Galvez, Gregory Zaslavsky, Zeya Krasko, Joseph V. Lima
  • Quartz arc tube for a metal halide lamp and method of making same
    Publication number: 20030057836
    Abstract: A quartz arc tube for a metal halide lamps and its method of making are described. The quartz arc tube has a cylindrical design which promotes a nearly symmetric longitudinal surface temperature profile during operation. The profile has a maximum temperature of about 900° C. which allows for longer operating life at high average wall loadings.
    Type: Application
    Filed: September 26, 2001
    Publication date: March 27, 2003
    Inventors: William D. Koenigsberg, Miguel Galvez, Gregory Zaslavsky, Zeya Krasko, Joseph V. Lima
  • Metal-halide lamp having heat redistribution means
    Patent number: 4859899
    Abstract: An improved metal-halide arc discharge lamp includes an arc tube having a substantially cylindrical body surrounded laterally by a substantially cylindrical heat-conserving sleeve within an evacuated outer envelope. The ratio of the outer radius of the arc tube divided by the inner radius of the sleeve falls within an optimum range of approximately 0.54 to approximately 0.68, and preferably within a range of approximately 0.60 to approximately 0.63. A lamp constructed in accordance with the invention exhibits improved luminous efficacy and color rendering in comparison to prior art counterparts. The improved performance is believed to be attributable to the more nearly isothermal operation of the arc tube for a given wall loading.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: August 22, 1989
    Assignee: GTE Products Corporation
    Inventors: William M. Keeffe, Zeya Krasko, Robert Karlotski, James C. Morris
  • Metal-halide lamp having heat redistribution means
    Patent number: 4791334
    Abstract: An improved metal-halide arc discharge lamp includes an arc tube having a substantially cylindrical body surrounded laterally by a substantially cylindrical heat-conserving sleeve within an evacuated outer envelope. The ratio of the outer radius of the arc tube divided by the inner radius of the sleeve falls within an optimum range of approximately 0.54 to approximately 0.68, and preferably within a range of approximately 0.60 to approximately 0.63. A lamp constructed in accordance with the invention exhibits improved luminous efficacy and color rendering in comparison to prior art counterparts. The improved performance is believed to be attributable to the more nearly isothermal operation of the arc tube for a given wall loading.
    Type: Grant
    Filed: May 7, 1987
    Date of Patent: December 13, 1988
    Assignee: GTE Products Corporation
    Inventors: William M. Keeffe, Zeya Krasko, Robert Karlotski, James C. Morris