Patents by Inventor Boudewijn Lodewijk Kropman

Boudewijn Lodewijk Kropman 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).

  • Color cathode ray tube and getter assembly
    Patent number: 6570318
    Abstract: A color cathode ray tube and a getter assembly for use in such a cathode ray tube. The getter assembly comprises a conducting strip for contacting a high-voltage contact with a magnetic screening cone inside a cone portion of the tube. Due to the relatively large deflection angle of modern cathode ray tubes with flat display screens, the getter assembly has to be made smaller. The getter assembly of the invention has a notch for directly engaging the high voltage contact. In case of reworking during the manufacturing process, an operator can slide the new getter assembly with the aid of a special tool, from the neck side along the inner wall for engagement with the high-voltage contact.
    Type: Grant
    Filed: March 14, 2001
    Date of Patent: May 27, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Ben Heinz Hageluken, Krishnekoemar Mahabir, Boudewijn Lodewijk Kropman
  • Colour cathode ray tube and getter assembly
    Publication number: 20010022493
    Abstract: The invention relates to a color cathode ray tube and a getter assembly for use in such a cathode ray tube. The getter assembly comprises a conducting strip for contacting a high-voltage contact with a magnetic screening cone inside a cone portion of the tube. Due to the relatively large deflection angle of modern cathode ray tubes with flat display screens, the getter assembly has to be made smaller. Furthermore, in case of reworking during the manufacturing process, an operator can slide the new getter assembly with the aid of a special tool, from the neck side along the inner wall for engagement with the high-voltage contact.
    Type: Application
    Filed: March 14, 2001
    Publication date: September 20, 2001
    Inventors: Ben Heinz Hageluken, Krishnekoemar Mahabir, Boudewijn Lodewijk Kropman