Patents by Inventor Wilfried L. Kohlmann

Wilfried L. Kohlmann 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).

  • Patent number: 6204598
    Abstract: The electric incandescent lamp has a sintered glass plate (1) through which current conductors (2) and a metal tube (3) extend. An incandescent body (4) is connected to said current conductors (2) aligned with respect to the sintered plate (1). A glass bulb (5) is present over the incandescent body (4), gastight secured to the sintered plate (1) by means of enamel (6). A water getter (20) and a heavy gas at an elevated pressure are present inside the glass bulb (5). The lamp may consume a relatively high power and may be relatively small, but nevertheless has a relatively long life.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: March 20, 2001
    Assignee: U.S. Philips Corporation
    Inventors: Ursula Bruggemann, Wilfried L. Kohlmann, Jacques M.J. Geboers, Antonius J.M. Van Hees
  • Patent number: 6140769
    Abstract: The electric incandescent lamp has a sintered glass plate through which current conductors and a metal tube extend. An incandescent body is connected to the current conductors aligned with respect to the plate. A glass bulb is present over the incandescent body, secured to the plate in a gastight manner by means of enamel. A water getter and a heavy gas at an elevated pressure are present inside the glass bulb.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: October 31, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Ursula Bruggemann, Wilfried L. Kohlmann, Jacques M.J. Geboers, Antonius J.M. Van Hees
  • Patent number: 6031331
    Abstract: The electric lamp has a quartz glass lamp vessel (1) having first and second neck-shaped portions (2, 3) with first and second seals (4, 5). Current supply conductors (6, 7, 8; 9, 10, 11) consist of a metal foil (7, 10) embedded in the respective seal (4, 5), an inner (6, 9) and an outer current wire (8, 11) connected hereto. A seal ends with a closed fracture surface (14) through which an outer current wire (8, 11) extends. Favorably, the edge (13) of the fracture surface (14) has some small indentations (16) adjacent the origin of the fracture (19). The total length of the lamp is about 2 mm less than that of its conventional counterpart.
    Type: Grant
    Filed: September 29, 1998
    Date of Patent: February 29, 2000
    Assignee: U.S. Phillips Corporation
    Inventors: Wilfried L. Kohlmann, Ludwig J. Bondgen