Patents by Inventor Yukio Homoto

Yukio Homoto 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).

  • Process for production of 1,1,1-trifluoro-2,2-dichloroethane
    Patent number: 5315044
    Abstract: A process for production of 1,1,1-trifluoro-2,2-dichloroethane comprising chlorination of 1,1,1-trifluoro-2-chloroethane with chlorine gas in the presence or absence of a metal salt as a catalyst.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: May 24, 1994
    Assignee: Daikin Industries Ltd.
    Inventors: Yasuhisa Furutaka, Yukio Homoto, Tsunetoshi Honda
  • Process for preparing fluoroalcohol
    Patent number: 5264637
    Abstract: A fluoroalcohol of the formulaRf(CH.sub.2 CH.sub.2 OH)n (1)is prepared by the following three kinds of processes:(a) by contacting a betaine compound with a halide compound of the formulaRf(CH.sub.2 CH.sub.2 X)n (2)to obtain an intermediate compound and subjecting the intermediate compound to hydrolysis,(b) by contacting a betaine compound and water in the presence of an organic solvent with a halide compound of the formulaRf(CH.sub.2 CH.sub.2 X)n (2), or(c) by contacting a betaine type surfactant and water with a halide compound of the formulaRf(CH.sub.2 CH.sub.2 X)n (2),wherein Rf is C.sub.2.about.13 fluoroalkyl or C.sub.2.about.13 fluoroalkylene group, X is iodine or bromine, n is 1 when Rf is fluoroalkyl group and n is 2 when Rf is fluoroalkylene group.
    Type: Grant
    Filed: October 4, 1991
    Date of Patent: November 23, 1993
    Assignee: Daikin Industries, Ltd.
    Inventors: Tutomu Yoshida, Kunitada Tanaka, Yasumichi Chiba, Yasuhisa Furutaka, Yukio Homoto
  • Process for production of 1,1,1-trifluoro-2,2-dichloroethane
    Patent number: 5171899
    Abstract: A process for production of 1,1,1-trifluoro-2,2-dichloroethane comprising chlorinationo f 1,1,1-trifluoro-2-chloroethane with chlorine gas in the presence or absence of a metal salt as a catalyst.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: December 15, 1992
    Assignee: Daikin Industries Ltd.
    Inventors: Yasuhisa Furutaka, Yukio Homoto, Tsunetoshi Honda
  • Process for production of 1,1,1-trifluoro-2,2-dichloroethane
    Patent number: 5132473
    Abstract: A process for production of 1,1,1-trifluoro-2,2-dichloroethane comprising reacting 1,1,1-trifluoro-2-chloroethane with hydrogen chloride and oxygen in the presence of a metal salt as a catalyst.
    Type: Grant
    Filed: September 21, 1990
    Date of Patent: July 21, 1992
    Assignee: Daikin Industries, Ltd.
    Inventors: Yasuhisa Furutaka, Yukio Homoto, Tsunetoshi Honda