Patents by Inventor Hubert Schafnitzel

Hubert Schafnitzel 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 mercury-vapor discharge lamp, and method of placing mercury therein
    Patent number: 5757129
    Abstract: A low-pressure mercury-vapor discharge lamp, which is equipped with Hg or amalgam, has a pumping tube opening (4) with constricted cross-section or lumen. A solid body in the pumping tube (3) prevents the mercury from emerging into the discharge space. At the same time, the particular shape of the constriction and of the solid body, respectively, makes it possible for Hg vapor to diffuse through-passages between the pumping tube and the solid body into discharge vessel.
    Type: Grant
    Filed: March 6, 1996
    Date of Patent: May 26, 1998
    Assignee: Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen mbH
    Inventors: Hubert Schafnitzel, Friedrich Lauter, John W. Shaffer