Patents by Inventor Maria Hoffmann

Maria Hoffmann 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).

  • Low-pressure gas discharge lamp with a reduced argon proportion in the gas filling
    Patent number: 7948182
    Abstract: The invention relates to novel gas fillings of low-pressure gas discharge lamps for reducing the starting and arc drop voltages at low Hg vapor pressures. In favor of a mixture consisting of Ne and Kr, the Ar portion of the gas filling is considerably reduced.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: May 24, 2011
    Assignee: OSRAM Gesellschaft mit beschraenkter Haftung
    Inventors: Martin Beck, Jürgen Dichtl, Roland Hoffmann, Maria Hoffmann, legal representative, Astrid Hoffmann, legal representative, Kerstin Hoffmann, legal representative
  • Illuminating Device Comprising a Lamp and a Reflector
    Publication number: 20100002427
    Abstract: A lighting device with at least one lamp and at least one reflector, wherein at least regions of a reflective surface of the reflector are in the form of an involute of a circle of a partial element of the lamp.
    Type: Application
    Filed: November 6, 2007
    Publication date: January 7, 2010
    Inventors: Franz Bachmeir, Martin Beck, Ulrich Biebel, Jürgen Dichtl, Roland Hoffmann, Maria Hoffmann
  • Low-Pressure Gas Discharge Lamp With a Reduced Argon Proportion In the Gas Filling
    Publication number: 20090284154
    Abstract: The invention relates to novel gas fillings of low-pressure gas discharge lamps for reducing the starting and arc drop voltages at low Hg vapor pressures. In favor of a mixture consisting of Ne and Kr, the Ar portion of the gas filling is considerably reduced.
    Type: Application
    Filed: July 25, 2006
    Publication date: November 19, 2009
    Applicant: Patent- Treuhand- Gesellschaft Fur Elektrische Gluhlampen MBH
    Inventors: Martin Beck, Jürgen Dichtl, Roland Hoffmann, Maria Hoffmann, Astrid Hoffmann, Kerstin Hoffmann