Patents by Inventor Toshio Hihara

Toshio Hihara 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).

  • Patent number: 4436906
    Abstract: An anthraquinone dye for cellulose-containing fibers having the formula (I) indicated below and a process for producing the same are disclosed: ##STR1## wherein R.sup.1 is an amino group or a hydroxyl group; R.sup.2 is a hydrogen atom, a chlorine atom, a bromine atom, a cyano group or --SO.sub.2 R (wherein R is a lower alkyl group or a phenyl group); R.sup.3 and R.sup.4 are each a hydrogen atom, an amino group, a hydroxyl group, a nitro group, a chlorine atom or a bromine atom; Y is a bonding group --O-- or --S--; one of X.sup.1 and X.sup.2 is a hydrogen atom and the other is ##STR2## (wherein Z is a bonding group --O-- or --S--; R.sup.5 is a lower alkyl group, a lower alkoxy group or a hydrogen atom; R.sup.6 and R.sup.7 are each a hydrogen atom or an alkyl group, an alkenyl group, a cyanohexyl group, an aryl group or an aralkyl group which may be substituted by a cyano group, a hydroxyl group, a lower alkoxy group or a dialkylamino group, or NR.sup.6 R.sup.
    Type: Grant
    Filed: May 20, 1982
    Date of Patent: March 13, 1984
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Toshio Niwa, Toshio Hihara
  • Patent number: 4276047
    Abstract: An anthraquinone dye for direct printing and pad dyeing of cellulose-containing fibers and of the formula: ##STR1## wherein A represents a phenylene group, Y represents a group --NH-- or --C.sub.2 H.sub.4 O--, X represents a carbamoyl group which may be substituted with a lower alkyl group or a lower alkoxy-lower alkyl group, a sulfamoyl group which may be substituted with a lower alkyl group or a lower alkoxy-lower alkyl group, a halogen atom or a cyano group, and Z represents an amino group, a mono- or di-alkylamino group having 1-6 carbon atoms in total, an anilino group, a lower alkoxy group or a group --O(R.sup.1 O).sub.n -R.sup.2 in which R.sup.1 represents an ethylene group or a propylene group, R.sup.2 represents a methyl group or an ethyl group and n is an integer of 1-5.
    Type: Grant
    Filed: April 18, 1980
    Date of Patent: June 30, 1981
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Seiichi Imahori, Toshio Hihara, Tomio Yomeyama, Takao Hirota