Patents by Inventor Yoshiko Kimura

Yoshiko Kimura 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).

  • Ferroelectric chiral smectic liquid crystal composition and liquid crystal device using same
    Patent number: 5599479
    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising at least one optically active compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of having a subtituent; X.sub.1 denotes a single bond, ##STR2## Z denotes a single bond or ##STR3## denotes ##STR4## and n is an integer of 1-12; and at least one compound represented by the following formula (II): ##STR5## wherein R.sub.2 and R.sub.3 respectively denote a linear or branched optically inactive alkyl group having 1-18 carbon atoms capable of having an alkoxy group of 1-12 carbon atoms; X.sub.2 and X.sub.3 respectively denote a single bond, ##STR6## and p and q are respectively 0, 1 or 2 with proviso that both of p and q are not 0.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: February 4, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Shinjo, Takao Takiguchi, Hiroyuki Kitayama, Kazuharu Katagiri, Masataka Yamashita, Takeshi Togano, Masahiro Terada, Akio Yoshida, Yoshiko Kimura
  • Ferroelectric chiral smectic liquid crystal composition and liquid crystal device using same
    Patent number: 5364559
    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising at least one compound represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 respectively denote a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent; X.sub.1 and X.sub.2 respectively denote a single bond, --O--, ##STR2## Y.sub.1 denotes --CH.sub.2 O-- or --OCH.sub.2 --; and m and n are respectively 1 or 2; and at least one compound represented by the following formula (II): ##STR3## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent; X.sub.3 denotes a single bond, --O-- or ##STR4## Z denotes a single bond or ##STR5## and p is an integer of 1-12.
    Type: Grant
    Filed: July 22, 1993
    Date of Patent: November 15, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Shinjo, Takao Takiguchi, Hiroyuki Kitayama, Kazuharu Katagiri, Masataka Yamashita, Takeshi Togano, Masahiro Terada, Junko Sato, Masanobu Asaoka, Takashi Iwaki, Yoshiko Kimura
  • Ferroelectric liquid crystal composition with improved driving voltage and temperature margins and liquid crystal device using same
    Patent number: 5292453
    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising: at least one optically active compound represented by the following formula (II): ##STR1## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent; X.sub.3 denotes a single bond, ##STR2## Z.sub.1 denotes a single bond or ##STR3## and m is 1-12; at least one compound represented by the following formula (III): ##STR4## wherein R.sub.4 and R.sub.5 respectively denote a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent, at lease one of R.sub.4 and R.sub.5 being optically active; X.sub.4 denotes a single bond, ##STR5## and X.sub.5 denotes a single bond, ##STR6## and at least one compound represented by the following formula (I) or (IV): ##STR7## wherein R.sub.1 and R.sub.2 respectively denote a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent of C.sub.1 -C.sub.12 alkoxy group; X.sub.1 and X.sub.
    Type: Grant
    Filed: April 19, 1993
    Date of Patent: March 8, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kenji Shinjo, Takao Takiguchi, Hiroyuki Kitayama, Kazuharu Katagiri, Masataka Yamashita, Masahiro Terada, Takeshi Togano, Yoshiko Kimura, Masanobu Asaoka, Junko Sato
  • Ferroelectric chiral smectic liquid crystal composition and liquid crystal device using same
    Patent number: 5250221
    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising at least one compound represented by the following formula (I): ##STR1## wherein R.sub.1 and R.sub.2 respectively denote a linear or branched alkyl group having 1-8 carbon atoms capable of having a substituent; X.sub.1 and X.sub.2 respectively denote a single bond, ##STR2## Y.sub.1 denotes --CH.sub.2 O-- or --OCH.sub.2 --; and m and n are respectively 1 or 2; and at least one compound represented by the following formula (II): ##STR3## wherein R.sub.3 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent, R.sub.4 denotes a linear alkyl group having 1-10 carbon atoms; X.sub.3 denotes a single bond, ##STR4## Y.sub.
    Type: Grant
    Filed: October 29, 1992
    Date of Patent: October 5, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Yamashita, Takeshi Togano, Masahiro Terada, Akio Yoshida, Yoshiko Kimura, Kenji Shinjo
  • Ferroelectric chiral smectic liquid crystal composition and liquid crystal device using same
    Patent number: 5173211
    Abstract: A ferroelectric chiral smectic liquid crystal composition, comprising at least one optically active compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes a linear or branched alkyl group having 1-18 carbon atoms capable of having a substituent; R.sub.2 denotes a linear or branched alkyl group having 1-14 carbon atoms capable of having a substituent; and X.sub.1 denotes a single bond, ##STR2## and at least one optically active compound represented by the following formula (II): ##STR3## wherein R.sub.3 denotes a linear alkyl group having 1-14 carbon atoms; R.sub.4 denotes a linear or branched alkyl group having 1-14 carbon atoms capable of having a substituent; and X.sub.
    Type: Grant
    Filed: July 12, 1989
    Date of Patent: December 22, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masataka Yamashita, Takeshi Togano, Masahiro Terada, Akio Yoshida, Yoshiko Kimura, Kenji Shinjo, Hiroyuki Kitayama, Shinichi Nakamura