Patents by Inventor Herman Pauwels

Herman Pauwels 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).

  • Liquid crystal device and a liquid crystal material
    Patent number: 6919950
    Abstract: The invention relates to a liquid crystal device, comprising an antiferroelectric liquid crystal material (AFLC material) having smectic layers, and two substrates confining the AFLC material therebetween, wherein the AFLC material is uniaxial negative. Preferably, the AFLC material is uniaxial as a consequence of a surface stabilization and of a selected smectic tilt angle ? of the AFLC material. Preferably, the angle ? is in the range of 40°???50°, especially 45°. The invention also relates to electrooptic liquid crystal devices.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: July 19, 2005
    Inventors: Roman S. Dabrowski, Witold J. Drzewinski, Herman Pauwels, Anders Dahlgren, Sven T. Lagerwall, Per Rudquist, Koen D'Have, Marek Matuszcyk, Pontus Jagemalm
  • Liquid crystal device and a liquid crystal material
    Publication number: 20020075445
    Abstract: The invention relates to a liquid crystal device, comprising an antiferroelectric liquid crystal material (AFLC material) having smectic layers, and two substrates confining said AFLC material therebetween, wherein said AFLC material is uniaxial negative. Preferably, the AFLC material is uniaxial as a consequence of a surface stabilization and of a selected smectic tilt angle &thgr; of said AFLC material. Preferably, said angle &thgr; is in the range of 40°<&thgr;<50°, especially 45°. The invention also relates to electrooptic liquid crystal devices.
    Type: Application
    Filed: August 28, 2001
    Publication date: June 20, 2002
    Inventors: Roman S. Dabrowski, Witold J. Drzewinski, Herman Pauwels, Anders Dahlgren, Sven T. Lagerwall, Per Rudquist, Koen D'Have, Marek Matuszcyk, Pontus Jagemalm
  • Method and assembly for recording a radiation image of an elongate body
    Patent number: 6273606
    Abstract: An assembly for recording a radiation image of an elongate body comprises a plurality of cassettes each conveying a recording member and each having a length that is smaller than the length of the elongate body. Supporting devices are arranged for holding the plurality of cassettes in a staggered arrangement so that the length of the staggered arrangement is at least equal to the length of the elongate body. This assembly is exposed to the radiation image of an elongate body. By use of partial images which are read from each of the recording members, the entire image of the elongate body is reconstructed.
    Type: Grant
    Filed: December 1, 1998
    Date of Patent: August 14, 2001
    Assignee: Agfa-Gevaert
    Inventors: Piet Dewaele, Piet Vuylsteke, Guy Marchal, Herman Pauwels