Patents by Inventor Mariko Kai

Mariko Kai 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: 4873018
    Abstract: An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): ##STR1## wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom; and an optically active compound derived from the fluoroalkanol and represented by the formula (Ib): ##STR2## wherein R and C* are the same as above, m is 1 or 2, n is 0 or 1, and A is a releasable substitutent. Because of the fluorine atom directly attached to an asymmetric carbon atom, these compounds are particularly effective in increasing a spontaneous polarization, improving a electric field responsive characteristic of a liquid crystal composition, and controlling the liquid crystal state.
    Type: Grant
    Filed: October 27, 1987
    Date of Patent: October 10, 1989
    Assignees: Canon Kabushiki Kaisha, Yamakawa Yakuhin Kogyo Kabushiki Kaisha
    Inventors: Hiroyuki Nohira, Masanao Kamei, Shinichi Nakamura, Kazuo Yoshinaga, Mariko Kai, Kazuharu Katagiri
  • Optically active compound, process for producing same and liquid crystal composition containing same
    Patent number: 4798680
    Abstract: An optically active 2-fluoro-1-alkanol compound represented by the formula (Ia): ##STR1## wherein R is an alkyl group having 1-16 carbon atoms, and C* is an asymmetric carbon atom; and an optically active compound derived from the fluoroalkanol and represented by the formula (Ib): ##STR2## wherein R and C* are the same as above, m is 1 or 2, n is 0 or 1, and A is a releasable substituent. Because of the fluorine atom directly attached to an asymmetric carbon atom, these compounds are particularly effective in increasing a spontaneous polarization, improving a electric field responsive characteristic of a liquid crystal composition, and controlling the liquid crystal state.
    Type: Grant
    Filed: October 16, 1986
    Date of Patent: January 17, 1989
    Assignees: Canon Kabushiki Kaisha, Yamakawa Yakuhin Kogyo Kabushiki Kaisha
    Inventors: Hiroyuki Nohira, Masanao Kamei, Shinichi Nakamura, Kazuo Yoshinaga, Mariko Kai, Kazuharu Katagiri