Patents by Inventor Kazuhige Yamagishi

Kazuhige Yamagishi 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).

  • Optically active compound, process for producing same and liquid crystal composition containing same
    Patent number: 4999130
    Abstract: An optically active 2-cyano-2-methyl-alkanoic acid represented by the formula: ##STR1## is produced by optical resolution of the corresponding racemic mixture thereof with an optically active amine and is reduced to provide an optically active 2-cyano-2-methyl-1-alkanol represented by the formula: ##STR2## wherein R.sub.1 denotes an alkyl groups having 3-10 carbon atoms, R.sub.2 denotes an alkyl group having 2-10 carbon atoms and C* denotes an asymmetric carbon atom. These compounds are characterized by having a CN group with a large dipole moment directly attached to an asymmetric carbon atom and are effective for controlling the liquid crystal state of a liquid crystal composition when added thereto.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: March 12, 1991
    Assignees: Canon Kabushiki Kaisha, Yamakawa Chemical Industry Co., Ltd.
    Inventors: Hiroyuki Nohira, Takashi Kimura, Tetsuya Abe, Yoko Yamada, Kazuhige Yamagishi