Patents by Inventor Johannes Maria Van Bragt

Johannes Maria Van Bragt 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
    Patent number: 4002939
    Abstract: Electric lamps according to the invention have inner current conductors with a molybdenum part which is welded to the molybdenum foil in the pinch of the quartz glass lamp vessel and a tungsten part which supports the electrode or the filament and is connected to the molybdenum part by a butt weld.As a result of this construction reject and production disturbances upon making the welded joint between the molybdenum foil and the inner current conductor which occur when tungsten current conductors are used are avoided.
    Type: Grant
    Filed: March 3, 1976
    Date of Patent: January 11, 1977
    Assignee: U.S. Philips Corporation
    Inventor: Johannes Maria Van Bragt