Patents by Inventor Annie Beguin

Annie Beguin 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).

  • Diphenyl benzoates and its use as a dopant for smectic liquid crystals
    Patent number: 4474679
    Abstract: The invention relates to an organic compound obtained by synthesis from 3,5-dihydroxybenzoic acid. The compound according to the invention is in accordance with the following general formula: ##STR1## in which R stands for an organic group of the alkyl, alkoxy or alkyl carboxylate type having 1 to 15 carbon atoms and in which X designates a nitrile or halogene group.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: October 2, 1984
    Assignee: Thomson-CSF
    Inventors: Jean C. Dubois, Pierre Le Barny, Jean P. Billard, Lydie Thirant, Serge Le Berre, Annie Beguin
  • Smectic liquid crystal display device without a nematic phase
    Patent number: 4464020
    Abstract: The invention relates to matrix access display devices using a mixed thermal and electric effect and provides a display device with mixed thermal-electric drive using a smectic liquid crystal deprived of a nematic phase by addition of appropriate dopes.
    Type: Grant
    Filed: August 20, 1982
    Date of Patent: August 7, 1984
    Assignee: Thomson-CSF
    Inventors: Serge Le Berre, Michel Hareng, Annie Beguin, Lydie Thirant