Patents by Inventor Higashi Ito

Higashi Ito 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 producing chloroprene
    Patent number: 4540838
    Abstract: Chloroprene is produced by reacting 3,4-dichlorobutene-1 in an aqueous solution of an alkali metal hydroxide in the presence of at least one of furfuryl alcohol and tetrahydrofurfuryl alcohol preferably at 20.degree. to 70.degree. C.
    Type: Grant
    Filed: July 31, 1980
    Date of Patent: September 10, 1985
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takao Iwasaki, Higashi Ito, Seiichi Watanabe
  • Isomerization of dichlorobutenes
    Patent number: 4461920
    Abstract: 3,4-Dichlorobutene-1 and 1,4-dichlorobutene-2 are isomerized in the presence of a catalyst of a combination of a copper compound or copper metal and at least one additive from the group of 1,3-diphenylguanidine, di-o-tolylguanidine, glycine ethyl ester hydrochloride and 2-amino-4-chlorophenol.
    Type: Grant
    Filed: February 12, 1980
    Date of Patent: July 24, 1984
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Higashi Ito, Seiichi Watanabe
  • Isomerization of dichlorobutenes
    Patent number: 4237074
    Abstract: 3,4-Dichlorobutene-1 and 1,4-dichlorobutene-2 are isomerized in the presence of a catalyst of a combination of a copper compound or copper metal and at least one additive from the group of 1,3-diphenylguanidine, di-o-tolylguanidine, glycine ethyl ester hydrochloride and 2-amino-4-chlorophenol.
    Type: Grant
    Filed: August 2, 1979
    Date of Patent: December 2, 1980
    Assignee: Denkyi Kagaku Kogyo Kabushiki Kaisha
    Inventors: Higashi Ito, Seiichi Watanabe