Patents by Inventor Yasunaga Katsumata

Yasunaga Katsumata 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).

  • Method for recovering 1,1,1-trichloroethane from textile materials
    Patent number: 4312633
    Abstract: 1,1,1-trichloroethane is recovered in an excellent yield from textile material without deterioration in quality of the textile material by a method in which a textile material is introduced into a hot water bath having a temperature of 64.degree. C. or more and a pH of 4.0 or more, so as to allow 1,1,1-trichloroethane to vaporize together with water, the mixture of vapors of 1,1,1-trichloroethane and water is condensed by cooling it, and then, the condensed 1,1,1-trichloroethane is separated from the condensed water.
    Type: Grant
    Filed: December 14, 1979
    Date of Patent: January 26, 1982
    Assignee: Asahi-Dow Limited
    Inventors: Ken Kazama, Ikuo Muramoto, Yasunaga Katsumata