Patents by Inventor Tooru Tabei

Tooru Tabei 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).

  • Water soluble disazo compound, copper salt thereof, and sheet or film colored therewith
    Patent number: 4514559
    Abstract: A water soluble disazo compound represented by the general formula: ##STR1## wherein X represents a hydrogen atom or a methyl, methoxy or ethoxy group, Y represents a methoxy or ethoxy group, R.sub.1 represents a hydrogen atom or a methyl group, R.sub.2 represents a hydrogen atom or a methyl, --C.sub.2 H.sub.4 OH, ##STR2## group, and the ##STR3## group is bonded at the 6- or 7-position, a copper complex salt thereof, and a sheet or film colored therewith.
    Type: Grant
    Filed: April 27, 1984
    Date of Patent: April 30, 1985
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Giichi Sato, Tadashi Matuo, Tooru Tabei
  • Red copper complexes of disazo compounds containing triazine groups
    Patent number: 4010150
    Abstract: Lightfast and waterfast azo dyes suitable for dyeing fibers and paper, particularly cellulosic materials, and having the following formula: ##STR1## wherein A is a group selected from 4-methoxy-2-sulfophenyl, 4-methoxy-3-sulfophenyl, 2- or 3-sulphonyl, tolyl, 4-nitro-2,2'-disulfostilbyl, sulfonaphthyl and 4-(4-sulfophenylazo)-2-sulfophenyl;B is selected from monoethanolamino, diethanolamino, morpholino, and N-methylamino;W is hydrogen or sulfonic acid; andZ is sulfonic acid attached at the meta or para position relative to the pendant diazo.
    Type: Grant
    Filed: December 4, 1973
    Date of Patent: March 1, 1977
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Tooru Tabei, Yasuhiko Arisaka, Yutaka Iizuka