Patents by Inventor Arthur Boller

Arthur Boller 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 esters
    Patent number: 4058478
    Abstract: Liquid crystal substances or compounds of the formula ##STR1## wherein R is as hereinafter set forth, AS WELL AS COMPOSITIONS AND ELECTRO-OPTICAL APPARATUSES CONTAINING THEM ARE DESCRIBED.
    Type: Grant
    Filed: August 20, 1975
    Date of Patent: November 15, 1977
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Arthur Boller, Hanspeter Scherrer
  • Liquid crystalline isonitriles
    Patent number: 4058476
    Abstract: Liquid crystal substances or compounds of the formula ##STR1## wherein X is ##STR2## and R is straight-chain alkyl, straight-chain alkoxy, straight-chain alkanoyloxy or p-alkyloxycarbonyloxy,As well as compositions and electro-optical apparatuses containing them, are described.
    Type: Grant
    Filed: August 18, 1975
    Date of Patent: November 15, 1977
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Arthur Boller, Hanspeter Scherrer
  • Liquid crystalline biphenyls
    Patent number: 4053431
    Abstract: Liquid crystalline compounds of the formula ##STR1## wherein R is as hereinafter set forth, WHICH ARE USEFUL AS DIELECTRICS IN ELECTRO-OPTICAL DEVICES, ARE DESCRIBED.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: October 11, 1977
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Hanspeter Scherrer, Arthur Boller
  • Electro-optical cell containing dielectric isonitriles
    Patent number: 3997242
    Abstract: Liquid crystal substances or compounds of the formula ##STR1## wherein X is ##STR2## and R is straight-chain alkyl, straight-chain alkoxy, straight-chain alkanoyloxy or p-alkyloxycarbonyloxy,As well as compositions and electro-optical apparatuses containing them, are described.
    Type: Grant
    Filed: August 18, 1975
    Date of Patent: December 14, 1976
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Arthur Boller, Hanspeter Scherrer
  • Phenyl-pyrimidines
    Patent number: 3997536
    Abstract: Phenyl-pyrimidines of the formula ##STR1## wherein R.sub.1 and R.sub.2 are as hereinafter set forth, are described. The end products are useful as liquid crystals.
    Type: Grant
    Filed: October 21, 1975
    Date of Patent: December 14, 1976
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Arthur Boller, Marco Cereghetti, Hanspeter Scherrer
  • Mixtures of liquid crystals
    Patent number: 3981817
    Abstract: Liquid crystalline mixtures comprising at least three compounds of the formula ##SPC1##Wherein R is n-butyl, n-pentyl, n-hexyl, n-heptyl or n-octyl, which may additionally contain other nematic or non-nematic substances, are described. The liquid crystalline mixtures are useful, for example, as dielectrics for electro-optical purposes.
    Type: Grant
    Filed: March 27, 1974
    Date of Patent: September 21, 1976
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Arthur Boller, Hanspeter Scherrer
  • Liquid crystal esters
    Patent number: 3963311
    Abstract: Liquid crystal substances or compounds of the formula ##SPC1##Wherein R is as hereinafter set forth, as well as compositions and electro-optical apparatuses containing them are described.
    Type: Grant
    Filed: August 20, 1975
    Date of Patent: June 15, 1976
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Arthur Boller, Hanspeter Scherrer
  • Liquid crystalline biphenyls
    Patent number: 3952046
    Abstract: Liquid crystalline compounds of the formula ##SPC1##Wherein R is as hereinafter set forth, which are useful as dielectrics in electro-optical devices, are described.
    Type: Grant
    Filed: November 14, 1974
    Date of Patent: April 20, 1976
    Assignee: Hoffmann-La Roche Inc.
    Inventors: Hanspeter Scherrer, Arthur Boller