Patents by Inventor Alain Pelissier

Alain Pelissier 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).

  • Parallax-free gas detector for x-rays
    Patent number: 4954710
    Abstract: An X-ray gas detector for analyzing a material by studying X-ray diffraction. In order to minimize the parallax error without resorting to auxiliary electrodes, difficult to manufacture, a radial field in the whole gas space (40) is generated only by means of input electrodes (36) set to appropriate voltages and by means of lateral electrodes (44) also individually set to appropriate voltages. By modifying the voltages, it is also possible to move the center of the spheric equipotentials for permitting the analysis without parallax error of samples (20) placed at variable distances (D) from mthe input window (32) of the detector.
    Type: Grant
    Filed: April 27, 1989
    Date of Patent: September 4, 1990
    Assignees: Centre National de la Recherche Scientifique, Societe Inel
    Inventors: Vincent Comparat, Jean Ballon, Pierre Carrechio, Alain Pelissier