Patents by Inventor Masayuki Tazume

Masayuki Tazume 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).

  • Dicyclohexylethane derivatives
    Patent number: 4431853
    Abstract: A 1,2-di[trans(equatorial-equatorial)cyclohexyl]-ethane derivative of the following general formula ##STR1## wherein R and R', independently from each other, represent a linear alkyl group having 1 to 10 carbon atoms.
    Type: Grant
    Filed: January 6, 1982
    Date of Patent: February 14, 1984
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Hisato Sato, Haruyoshi Takatsu, Kiyofumi Takeuchi, Yutaka Fujita, Masayuki Tazume, Hiroyuki Ohnishi
  • 1-Cyclohexyl-2-cyclohexylphenylethane derivatives
    Patent number: 4393258
    Abstract: A 1-cyclohexyl-2-cyclohexylphenylethane derivative of the following general formula ##STR1## wherein R.sub.1 and R.sub.2, independently from each other, represent a linear alkyl group having 1 to 7 carbon atoms.
    Type: Grant
    Filed: June 10, 1982
    Date of Patent: July 12, 1983
    Assignee: Dainippon Mk & Chemicals Inc.
    Inventors: Hisato Sato, Haruyoshi Takatsu, Yutaka Fujita, Masayuki Tazume, Kiyohumi Takeuchi, Hiroyuki Ohnishi
  • Nematic liquid crystalline materials
    Patent number: 4202791
    Abstract: Novel trans(equatorial-equatorial)1,4-disubstituted cyclohexane derivatives of the general formula ##STR1## wherein R represents a linear alkyl group containing 3 to 7 carbon atoms, and R' represents a linear alkoxy group containing 2 to 5 carbon atoms or a cyano group. These compounds are nematic liquid crystals, and a composition containing at least one of these compounds is useful as an electro-optical display material.
    Type: Grant
    Filed: February 14, 1979
    Date of Patent: May 13, 1980
    Assignee: Dainippon Ink & Chemicals Inc.
    Inventors: Hisato Sato, Haruyoshi Takatsu, Masayuki Tazume
  • Nematic liquid crystalline compounds
    Patent number: 4178302
    Abstract: Nematic liquid crystalline 4,4'-substituted derivatives of cyclohexene-1-carboxylic acid phenylthiol esters represented by the general formula ##STR1## wherein R.sub.1 is a linear alkyl group containing 3 to 7 carbon atoms, and R.sub.2 is a linear alkoxy group containing 2 to 5 carbon atoms.
    Type: Grant
    Filed: November 21, 1978
    Date of Patent: December 11, 1979
    Assignee: Dainippon Ink & Chemicals, Inc.
    Inventors: Hisato Sato, Haruyoshi Takatsu, Masayuki Tazume
  • Liquid crystalline composition
    Patent number: 4115310
    Abstract: A liquid crystalline composition comprising a nematic liquid crystalline substance and as an additive, a 1,8-diazo-bicyclo(5,4,0) undecene-7 alkyl ammonium salt of benzoic acid optionally having a substituent at the paraposition.
    Type: Grant
    Filed: October 13, 1976
    Date of Patent: September 19, 1978
    Assignees: Dainippon Ink & Chemicals Inc., Kawamura Institute of Chemical Research
    Inventors: Hisato Sato, Masayuki Tazume, Takasi Yamaki, Yutaka Fujita, Yoshi Arai
  • Nematic liquid crystal composition
    Patent number: 4048089
    Abstract: A nematic liquid crystal composition comprising (I) 4-n-valeryloxy-4'-cyanobiphenyl, (II) 4-n-caproyloxy-4'-cyanobiphenyl and (III) 4'-cyanophenyl-4-n-heptylbenzoate, and either (IV) 4'-cyanophenyl-4-n-butylbenzoate or (V) 4'-cyanophenyl-4-n-nonylbenzoate, said composition having a crystal-nematic transition temperature of -40.degree. to -20.degree. C and a nematic-isotropic transition temperature of 50.degree. to 65.degree. C.
    Type: Grant
    Filed: July 6, 1976
    Date of Patent: September 13, 1977
    Assignees: Dainippon Ink & Chemicals, Inc., Kawamura Institute of Chemical Research
    Inventors: Yoshi Arai, Kazuo Kimura, Hisato Sato, Takasi Yamaki, Katsuhiko Morita, Masanao Ohzeki, Haruyoshi Takatsu, Yutaka Fujita, Masayuki Tazume