Patents by Inventor Katsuyuki Kawano

Katsuyuki Kawano 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 crystalline compound having difluoropropyleneoxy group as bonding group, liquid crystal composition and liquid crystal display element
    Patent number: 6544604
    Abstract: The present invention provides a liquid crystalline compound having a difluoropropyleneoxy group as a bonding group, which is represented by Formula (1): wherein R1 and R2 each independently represent hydrogen, halogen, a cyano group or an alkyl group having 1 to 20 carbon atoms; rings A1 to A5 each independently represent a 1,4-cyclohexylene group, a 1,4-cyclohexenylene group or a 1,4-phenylene group; Z1 to Z4 each independently represent a single bond, —CH2CH2—, —CH2O—, —OCH2—, —COO—, —OCO—, —CH═CH—, —C≡C—, —CF2O— or —OCF2—; Y1, Y2, Y3 and Y4 each independently represent hydrogen or fluorine; and k, l, m and n each independently represent 0 or 1. This liquid crystalline compound has a large absolute value (|&Dgr;&egr;|) of a dielectric anisotropy and shows a relatively small refractive anisotropy.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: April 8, 2003
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Shuichi Matsui, Yasuyuki Sasada, Kazutoshi Miyazawa, Hiroyuki Takeuchi, Katsuyuki Kawano, Yasuhiro Kubo, Etsuo Nakagawa, Mayumi Furuya
  • Cyclohexane derivatives, liquid crystal compositions comprising the same and liquid crystal display devices
    Patent number: 6500503
    Abstract: Liquid crystalline compounds are disclosed which have large dielectric anisotropy and relatively low viscosity, and which are represented by formula (1) wherein R1 represents hydrogen or C1-C15 alkyl in which one or more non-adjacent methylene may be replaced by oxygen, sulfur or —CH═CH— and one or more hydrogen may be replaced by halogen; R2 represents hydrogen, cyano, halogen or C1-C15 alkyl in which one or more non-adjacent methylene may be replaced by oxygen, sulfur or —CH═CH— and one or more hydrogen may be replaced by halogen; L represents halogen or hydrogen; A1, A2, A4 and A5 each independently represent trans-1,4-cyclohexylene or 1,4-phenylene, one or more —CH2— in the trans-1,4-cyclohexylene may be replaced by oxygen or sulfur, one or more ═CH— in the 1,4-phenylene may be replaced by nitrogen, and one or more hydrogen in the 1,4-phenylene ring may be replaced by halogen; A3represents trans-1,4-cyclohexylene in which one or mo
    Type: Grant
    Filed: April 26, 2001
    Date of Patent: December 31, 2002
    Assignees: Chisso Corporation, Chisso Petrochemical Corporation
    Inventors: Koichi Shibata, Shuichi Matsui, Hiroyuki Tekeuchi, Katsuyuki Kawano, Yasuhiro Kubo, Etsuo Nakagawa
  • Liquid crystalline compound having difluoropropyleneoxy group as bonding group, liquid crystal composition and liquid crystal display element
    Publication number: 20020119260
    Abstract: The present invention provides a liquid crystalline compound having a difluoropropyleneoxy group as a bonding group, which is represented by Formula (1): 1
    Type: Application
    Filed: August 10, 2001
    Publication date: August 29, 2002
    Inventors: Shuichi Matsui, Yasuyuki Sasada, Kazutoshi Miyazawa, Hiroyuki Takeuchi, Katsuyuki Kawano, Yasuhiro Kubo, Etsuo Nakagawa, Mayumi Furuya
  • Cyclohexane derivatives, liquid crystal compositions comprising the same and liquid crystal display devices
    Publication number: 20020066888
    Abstract: Liquid crystalline compounds are disclosed which have large dielectric anisotropy and relatively low viscosity, and which are represented by formula (1) 1
    Type: Application
    Filed: April 26, 2001
    Publication date: June 6, 2002
    Inventors: Koichi Shibata, Shuichi Matsui, Hiroyuki Takeuchi, Katsuyuki Kawano, Yasuhiro Kubo, Etsuo Nakagawa