Patents by Inventor Bart Van Der Leeuw, deceased

Bart Van Der Leeuw, deceased 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 lamp having seals with metal foil therein
    Patent number: 6078140
    Abstract: The electric lamp has a vacuumtight seal (4) on the longitudinal axis (2) of a glass lamp vessel (1). An internal (12) and an external conductor (13) each have an end (14) inside the seal (4) and extend through a common axial region (5) of the seal (4) in a spaced apart manner. Several metal foils (11) arranged in a flat plane of the seal (4) extend parallel one to the other, in a transversal direction thereof. They have knife-shaped transversal edges (15) and are welded to the internal (12) and the external (13) conductors. The current conductors (10) constituted by the foils (11), the internal (12) and the external (13) conductors are able to conduct rather high currents. The lamp, nevertheless, is of a simple, strong and reliable construction.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: June 20, 2000
    Assignee: U.S. Philips Corporation
    Inventors: Bart Van Der Leeuw, deceased, by Henricus J. Kunnen, legal representative