Patents by Inventor Teja Lehmann

Teja Lehmann 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 lamp with fill comprising lead halide
    Patent number: 7683549
    Abstract: A metal halide fill for forming an ionizable fill comprises at least one inert gas, mercury and metal halides, comprising the constituents Na halide, Tl halide, Ca halide and halides of the rare earths. It also comprises Pb halide. This fill may be present in particular in the discharge vessel of a metal halide lamp which has an outer bulb.
    Type: Grant
    Filed: June 1, 2006
    Date of Patent: March 23, 2010
    Assignee: OSRAM Gesellschaft mit beschraenkter Haftung
    Inventor: Teja Lehmann
  • Metal halide lamp
    Publication number: 20060273726
    Abstract: A metal halide fill for forming an ionizable fill comprises at least one inert gas, mercury and metal halides, comprising the constituents Na halide, Tl halide, Ca halide and halides of the rare earths. It also comprises Pb halide. This fill may be present in particular in the discharge vessel of a metal halide lamp which has an outer bulb.
    Type: Application
    Filed: June 1, 2006
    Publication date: December 7, 2006
    Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN MBH
    Inventor: Teja Lehmann
  • Method of supplying current to a sodium high-pressure discharge lamp, and current supply system
    Patent number: 5481162
    Abstract: To provide for optimum control of a sodium high-pressure discharge lamp operating under saturated operating conditions, such that the lamp will be operating stably and providing light output which is an optimum with respect to the color rendition index (Ra), light output or luminous flux, and color temperature, without regard to manufacturing tolerances or variations in power supply voltage, the energy supplied to the lamp is controlled with respect to a quotient formed of lamp voltage and lamp current (V.sub.L /I.sub.L), said quotient being determined with respect to optimum light values. The power supply for the lamp (3) either is a stabilized output voltage power supply (22) in which the output current is controlled, or an oscillator (32) providing bursts or power pulses (10, 10') formed of oscillations (11).
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: January 2, 1996
    Assignee: Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen mbh
    Inventors: Michael Boenigk, Klaus Guenther, Hans-Georg Kloss, Teja Lehmann