Patents by Inventor Andreas Maciejewski

Andreas Maciejewski 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 discharge lamp with a device for switching it off at the end of its service life
    Patent number: 6838813
    Abstract: The invention relates to a low-pressure discharge lamp, having a tubular discharge vessel made from glass, the free ends of which are closed off in a gas tight manner, two electrode systems (3) each having a filament (7), two supply conductors (5, 6) and a bead (8) of glass, the ends of the supply conductors (5, 6) being fused into the ends of the discharge vessel which have been closed off in a gas tight manner and, in order to be held in a region between the filament (7) and the discharge vessel fused seal (2), into the bead (8), and a device for switching off the lamp at the end of its service life, comprising a paste (9) which contains a metal hydride and is fitted to the bead (8). According to the invention, the bead (8) consists of a glass material which has a resistivity of greater 108 ?cm at 350° C.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: January 4, 2005
    Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH
    Inventors: Bernhard Blohm, Kirsten Fuchs, Achim Hilscher, Peter Husslein, Gerald Hämmer, Andreas Maciejewski, Thomas Noll, Klaus Pankratz, Klaus Weingärtner
  • Low-pressure discharge lamp with a device for switching it off at the end of its service life
    Publication number: 20040012333
    Abstract: The invention relates to a low-pressure discharge lamp, having a tubular discharge vessel made from glass, the free ends of which are closed off in a gas tight manner, two electrode systems (3) each having a filament (7), two supply conductors (5, 6) and a bead (8) of glass, the ends of the supply conductors (5, 6) being fused into the ends of the discharge vessel which have been closed off in a gas tight manner and, in order to be held in a region between the filament (7) and the discharge vessel fused seal (2), into the bead (8), and a device for switching off the lamp at the end of its service life, comprising a paste (9) which contains a metal hydride and is fitted to the bead (8). According to the invention, the bead (8) consists of a glass material which has a resistivity of greater 108 &OHgr;cm at 350° C.
    Type: Application
    Filed: April 25, 2003
    Publication date: January 22, 2004
    Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCH GLUHLAMPEN MBH
    Inventors: Bernhard Blohm, Kirsten Fuchs, Achim Hilscher, Peter Husslein, Gerald Hammer, Andreas Maciejewski, Thomas Noll, Klaus Pankratz, Klaus Weingartner