Patents by Inventor Yuko Etoh

Yuko Etoh 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: 5126071
    Abstract: An optically active functional compound represented by the following formula (1) is disclosed: ##STR1## wherein R denotes an alkyl group having 1-14 carbon atoms; --X-- denotes ##STR2## Y denotes a single bond, ##STR3## or --O--; n=0, 1 or 2; and C* denotes an asymmetric carbon atom. The compound of the formula (1) may be produced through an optically active compound of the following formula (2) or (3): ##STR4## The compounds of the above formulas (1)-(3) are all characterized by a trifluoromethyl group providing a large spontaneous polarization attached to an asymmetric carbon atom.
    Type: Grant
    Filed: August 7, 1991
    Date of Patent: June 30, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Nohira, Masanao Kamei, Hideki Kanazawa, Tetsuya Abe, Yoko Yamada, Yuko Etoh
  • Optically active compound and liquid crystal composition containing same
    Patent number: 5073306
    Abstract: An optically active, generally mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes an alkyl group having 1-18 carbon atoms, R.sub.2 denotes an alkyl group having 1-12 carbon atoms; X denotes a single bond, --O--, ##STR2## Y denotes a single bond, ##STR3## --CH.sub.2 O-- or --OCH.sub.2 --; Z denotes --OCH.sub.2 --, ##STR4## C* denotes an asymmetric carbon atom; k, m and n are respectively 0, 1 or 2 with proviso that k+m+n amounts to 2 or 3; and p is 1 or 2.
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: December 17, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Nohira, Masanao Kamei, Hideki Kanazawa, Yoko Yamada, Yuko Etoh
  • Optical active compound, process for producing same and liquid crystal composition containing same
    Patent number: 4917817
    Abstract: An optically active functional compound represented by the following formula (1) is disclosed: ##STR1## wherein R denotes an alkyl group having 1-14 carbon atoms; -X- denotes ##STR2## denotes a single bond, ##STR3## n=0, 1 or 2; and C* denotes an asymmetric carbon atom. The compound of the formula (1) may be produced through an optically active compound of the following formula (2) or (3): ##STR4## The compounds of the above formulas (1)-(3) are all characterized by a trifluoromethyl group providing a large spontaneous polarization attached to an asymmetric carbon atom.
    Type: Grant
    Filed: July 21, 1988
    Date of Patent: April 17, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Nohira, Masanao Kamei, Hideki Kanazawa, Tetsuya Abe, Yoko Yamada, Yuko Etoh
  • Optically active compound and liquid crystal composition containing same
    Patent number: 4918213
    Abstract: An optically active, generally mesomorphic compound represented by the following formula (I): ##STR1## wherein R.sub.1 denotes an alkyl group having 1-18 carbon atoms, R.sub.2 denotes an alkyl group having 1-12 carbon atoms; X denotes a single bond, --O--, ##STR2## Y denotes a single bond, ##STR3## --CH.sub.2 O-- or --OCH.sub.2 --; Z denotes --OCH.sub.2 --, ##STR4## respectively denotes ##STR5## C* denotes an asymmetric carbon atom; k, m and n are respectively 0, 1 or 2 with proviso that k+m+n amounts to 2 or 3; and p is 1 or 2.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: April 17, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroyuki Nohira, Masanao Kamei, Hideki Kanazawa, Yoko Yamada, Yuko Etoh