Patents by Inventor Laurent H. T. Demets

Laurent H. T. Demets 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).

  • Electric incandescent lamp
    Patent number: 4959586
    Abstract: The electric incandescent lamp has a filament (2) comprising light-emitting sections (5,6,7) and non-light-emitting sections (8,9) integral therewith. A non-light-emitting section (9) has at its two ends a helically wound portion (10,11), which portions are interconnected by the tungsten wire (3) from which the filament (2) is wound. An additional tungsten wire (14) extends along the non-light-emitting section (9) and is wound around each of its helically wound portions (10,11). The incandescent lamp has a filament (2) of a simple construction, whose manufacture can readily be mechanized.
    Type: Grant
    Filed: May 11, 1989
    Date of Patent: September 25, 1990
    Assignee: U.S. Philips Corporation
    Inventors: Stephanus J. Claessens, Laurent H. T. Demets