Patents by Inventor Toshikazu Tamiya

Toshikazu Tamiya 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: 5496380
    Abstract: A dispersed dye composition which is (A) a combination of blue dye composition (1) and red dye composition (2); (B) a combination of blue dye composition (1) and yellow dye composition (3); or (C) a combination of blue dye composition (1), red dye composition (2) and yellow dye composition (3); wherein blue dye composition (1) consists of from 35 to 55 weight percent of a compound of Formula (I), from 35 to 55 weight percent of a compound of Formula (II) and from 2 to 20 weight percent of a compound of Formula (III); red dye composition (2) consists of at least one red dye selected from the group of compounds of Formulas (IV-1) and (IV-2); and yellow dye composition (3) consists of at least one dye within the scope of the compound of Formula (V).
    Type: Grant
    Filed: May 18, 1995
    Date of Patent: March 5, 1996
    Assignee: Dystar Japan Ltd.
    Inventors: Hideaki Imafuku, Takashi Fujita, Toshikazu Tamiya, Kuniko Kira
  • Patent number: 5433754
    Abstract: A disperse dye composition comprising:(A) a yellow dye mixture comprising from 20 to 60 wt % of a compound of the following formula (I) and from 80 to 40 wt % of a compound of the following formula (II) (the sum of (I) and (II) is 100 wt %): ##STR1## wherein each of X.sup.1 and X.sup.2 which are independent of each other, is a halogen atom, and R.sup.1 is --C.sub.2 H.sub.4 CN or --C.sub.2 H.sub.4 OCOC.sub.6 H.sub.5, and(B) a blue dye mixture comprising from 75 to 95 wt % of a compound of the following formula (III) and from 25 to 5 wt % of the following formula (IV) (the sum of (III) and (IV) is 100 wt % ): ##STR2## and/or (C) a red dye of the following formula (V): ##STR3## wherein each of R.sup.2 and R.sup.3 which are independent of each other, is a methyl group or an ethyl group.
    Type: Grant
    Filed: March 18, 1994
    Date of Patent: July 18, 1995
    Assignee: Hoechst Mitsubishi Kasai Co., Ltd.
    Inventors: Hideaki Imafuku, Kaoru Fujikawa, Toshikazu Tamiya, Kuniko Kira