Patents by Inventor Renate Kaiser

Renate Kaiser 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 vapour discharge lamp
    Patent number: 5907216
    Abstract: A low-pressure mercury vapour discharge lamp according to the invention is provided with a radiation-transmitting discharge vessel (10) which encloses a discharge space (11) in a gastight manner and comprises mercury as well as a rare gas. Mercury is also present in a vapour pressure control member (21) which is in communication with the discharge space (11) during nominal operation. The discharge lamp has means (40) for maintaining a discharge in the discharge space (11). The vapour pressure control member (21) forms part of a mercury control member (20) which also comprises mercury transport control means (22) which limit the mercury transport from the discharge space (11) to the vapour pressure control member (21), at least while the lamp is out of operation, to such an extent that this transport is at most 5 ng/h.cm.sup.3, measured at room temperature and in the presence of a saturated mercury vapour in the discharge vessel, per unit volume of the discharge space.
    Type: Grant
    Filed: July 13, 1995
    Date of Patent: May 25, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Franciscus A.S. Ligthart, Willem J. Van Den Bogert, Johannes T.J. Van Haastrecht, Renate Kaiser
  • Metal iodide vapour discharge lamp
    Patent number: 3947714
    Abstract: To obtain an iron spectral lamp iron iodide and hydrogen are introduced into a discharge lamp.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: March 30, 1976
    Inventors: Ludwig Rehder, Renate Kaiser, Roland Lorenz