Patents by Inventor Leonardus Th. M. Van Hout

Leonardus Th. M. Van Hout 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).

  • Cathode ray tube and method of manufacturing a cathode ray tube
    Patent number: 5690992
    Abstract: A cathode ray tube in which a glass-enamel layer having particles with a secondary electron emission coefficient smaller than 1, for example Cr.sub.2 O.sub.3 particles, is provided in the neck.The percentage of particles exceeds approximately 30% and the surface resistance ranges between 10.sup.10 and 10.sup.14 .OMEGA./.quadrature.. The high-voltage behaviour of such a layer is satisfactory. The convergence drift is relatively small. In addition, a description is given of a method of providing such a glass-enamel layer.
    Type: Grant
    Filed: April 1, 1996
    Date of Patent: November 25, 1997
    Assignee: U.S. Philips Corporation
    Inventor: Leonardus Th. M. Van Hout
  • Cathode ray tube
    Patent number: 5536997
    Abstract: A cathode ray tube in which a glass-enamel layer having particles with a secondary electron emission coefficient smaller than 1, for example Cr.sub.2 O.sub.3 particles, is provided in the neck. The percentage of particles exceeds approximately 30% and the surface resistance or resistivity ranges between 10.sup.10 and 10.sup.14 .OMEGA./.quadrature.. The high-voltage behavior of such a layer is satisfactory. The convergence drift is relatively small. In addition, a description is given of a method of providing such a glass-enamel layer.
    Type: Grant
    Filed: April 17, 1992
    Date of Patent: July 16, 1996
    Assignee: U.S. Philips Corporation
    Inventor: Leonardus Th. M. Van Hout