Patents by Inventor Yoshito Furukawa

Yoshito Furukawa 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).

  • 4'-cyano-3'-halogenophenyl 4-(5-substituted-pyrimidin-2-yl)benzoate derivatives and liquid crystal composition comprising same
    Patent number: 4756847
    Abstract: Novel compounds which, when used as a components of liquid crystal compositions, have good compatibility with other components and also have large values of dielectric anisotropy and optical anisotropy, and liquid crystal compositions containing the same are provided, which compounds are 4'-cyano-3'-halogenophenyl 4-(5-substituted-pyrimidin-2-yl)benzoate expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 10 carbon atoms or --(CH.sub.2).sub.m --O--(CH.sub.2).sub.p --CH.sub.3 wherein m and p each represent an integer of 0 to 8 and m+p.ltoreq.8, and X represents a halogen atom.
    Type: Grant
    Filed: January 8, 1986
    Date of Patent: July 12, 1988
    Assignee: Chisso Corporation
    Inventors: Naoyuki Yoshida, Kisei Kitano, Yoshito Furukawa, Tetsuya Ogawa, Shigeru Sugimori, Yasuyuki Goto, Toyoshiro Isoyama, Kazunori Nigorikawa
  • Novel liquid crystal compound for high temperatures
    Patent number: 4684478
    Abstract: A compound which, when added as a component to other components, raises the N-I point of the resulting liquid crystal composition and nevertheless affords only a relatively small rise in viscosity of the composition, and a liquid crystal composition containing the same are provided, which compound is a 1-(trans-4'-alkylcyclohexyl)-2-4"-[trans-4"'-(trans-4""-alkylcyclohexyl)cy clohexylphenyl]ethane expressed by the formula ##STR1## wherein R.sup.1 and R.sup.2 each represent an alkyl group of 1 to 10 carbon atoms.
    Type: Grant
    Filed: January 6, 1986
    Date of Patent: August 4, 1987
    Assignee: Chisso Corporation
    Inventors: Shigeru Sugimori, Yasuyuki Goto, Toyoshiro Isoyama, Kazunori Nigorikawa, Tetsuya Ogawa, Kisei Kitano, Naoyuki Yoshida, Yoshito Furukawa
  • Pyrimidine derivative and liquid crystal composition containing same
    Patent number: 4684476
    Abstract: A novel pyrimidine derivative which, when used as a component of a liquid crystal composition, is useful for driving a liquid crystal cell containing the composition at low voltages, and a liquid crystal composition containing the same are provided, which pyrimidine derivative is expressed by the formula ##STR1## wherein n represents an integer of 0 or 1; R represents an alkyl or alkoxy group of 1 to 10 carbon atoms; and X.sub.1, X.sub.2 and X.sub.3 each represent hydrogen atom, F, Cl or Br as halogeno group, cyano group or trifluoromethyl group and at least one of X.sub.1, X.sub.2 and X.sub.3 is trifluoromethyl group.
    Type: Grant
    Filed: February 11, 1986
    Date of Patent: August 4, 1987
    Assignee: Chisso Corporation
    Inventors: Kisei Kitano, Tetsuya Ogawa, Yoshito Furukawa, Naoyuki Yoshida, Shigeru Sugimori, Yasuyuki Goto, Toyoshiro Isoyama, Kazunori Nigorikawa
  • Phenoxypropanol ester derivative
    Patent number: 4673529
    Abstract: A novel liquid crystal compound useful as a component of liquid crystal compositions and a liquid crystal composition containing the same are provided, which compound is a phenoxypropanol ester derivative expressed by the formula ##STR1## wherein R.sup.1 and R.sup.2 each represent an alkyl group or an alkoxy group each of 1 to 15 carbon atoms, F atom, Cl atom or CN group, but either one of R.sup.1 and R.sup.
    Type: Grant
    Filed: November 27, 1985
    Date of Patent: June 16, 1987
    Assignee: Chisso Corporation
    Inventors: Shigeru Sugimori, Tetsuya Ogawa, Yasuyuki Goto, Toyoshiro Isoyama, Kazunori Nigorikawa, Kisei Kitano, Naoyuki Yoshida, Yoshito Furukawa
  • 1,4-dipyrimidinylbenzene derivative
    Patent number: 4640796
    Abstract: A novel 1,4-dipyrimidinylbenzene derivative which is useful as a component constituting a liquid crystal composition which is superior in properties and also physically and chemically stable, as a material for liquid crystal display elements, and a liquid crystal composition containing the same are provided, which derivative is expressed by the formula ##STR1## wherein X represents an alkyl group or an alkoxy group each of 1 to 10 carbon atoms, methylthio group or cyano group and Y represents an alkyl group or an alkoxy group each of 1 to 10 carbon atoms.
    Type: Grant
    Filed: November 26, 1985
    Date of Patent: February 3, 1987
    Assignee: Chisso Corporation
    Inventors: Naoyuki Yoshida, Kisei Kitano, Yoshito Furukawa, Tetsuya Ogawa, Shigeru Sugimori, Yasuyuki Goto, Toyoshiro Isoyama, Kazunori Nigorikawa