Patents by Inventor Ryouichi Sekioka

Ryouichi Sekioka 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: 6121352
    Abstract: The present invention relates to dye mixtures comprising at least one compound of the formula (I) ##STR1## and at least one compound of the formula (II) ##STR2## where the substituents are each as defined in the description part, which are highly useful for dyeing and printing hydrophobic synthetic material.
    Type: Grant
    Filed: March 18, 1999
    Date of Patent: September 19, 2000
    Assignee: Dystar Textifarben GmbH & Co.
    Inventors: Manfred Hoppe, Kiyoshi Himeno, Ryouichi Sekioka
  • Patent number: 5608042
    Abstract: A monoazo dye of the following formula (I): ##STR1## wherein R is phenyl, phenoxy or benzyl, and D is a group of the formula (D1), (D2), (D3) or (D4): ##STR2## wherein each of X.sup.1, X.sup.2 and X.sup.3, which are independent of one another, is hydrogen or chlorine, X.sup.4 is hydrogen, chlorine, methyl or --NHCOR.sup.1, wherein R.sup.1 is C.sub.1-4 alkyl or phenyl; ##STR3## wherein X.sup.4 is as defined above, Y.sup.1 is hydrogen, chlorine or C.sub.1-4 alkoxy; ##STR4## wherein X.sup.5 is hydrogen, halogen, methyl or --NHZ, wherein Z is C.sub.1-4 alkylsurfonyl, C.sub.1-4 alkylcarbonyl, phenylsulfonyl, phenylcarbonyl, C.sub.1-2 alkoxy C.sub.1-2 alkylcarbonyl or aminocarbonyl, Y.sup.2 is hydrogen, methyl or C.sub.1-2 alkoxy, and Q.sup.1 is cyano or C.sub.1-4 alkylcarbonyl; ##STR5## wherein P is formyl, nitro or cyano, Q.sup.2 is cyano or nitro, T is halogen, methyl, phenyl or methylsulfonyl, X.sup.5 is as defined above, and Y.sup.3 is hydrogen or C.sub.1-2 alkoxy.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: March 4, 1997
    Assignee: Dystar Japan Ltd.
    Inventors: Kiyoshi Himeno, Toshio Hihara, Ryouichi Sekioka
  • Patent number: 5595575
    Abstract: A blue disperse dye mixture comprising a monoazo dye of the following formula (1) and at least one azo dye selected from the group consisting of dyes of the following formulas (2), (3), (4) and (5): ##STR1## wherein each of the variables is defined in the specification.
    Type: Grant
    Filed: November 8, 1995
    Date of Patent: January 21, 1997
    Assignee: DyStar Japan Ltd.
    Inventors: Kiyoshi Himeno, Toshio Hihara, Ryouichi Sekioka
  • Patent number: 5527888
    Abstract: A monoazo dye of the following formula (I): ##STR1## wherein R is phenyl, phenoxy or benzyl, and D is a group of the formula (D1), (D2), (D3) or (D4): ##STR2## wherein each of X.sup.1, X.sup.2 and X.sup.3, which are independent of one another, is hydrogen or chlorine, X.sup.4 is hydrogen, chlorine, methyl or --NHCOR.sup.1, wherein R.sup.1 is C.sub.1-4 alkyl or phenyl; ##STR3## wherein X.sup.4 is as defined above, Y.sup.1 is hydrogen, chlorine or C.sub.1-4 alkoxy; ##STR4## wherein X.sup.5 is hydrogen, halogen, methyl or --NHZ, wherein Z is C.sub.1-4 alkylsulfonyl, C.sub.1-4 alkylcarbonyl, phenylsulfonyl, phenylcarbonyl, C.sub.1-2 alkoxy C.sub.1-2 alkylcarbonyl or aminocarbonyl, Y.sup.2 is hydrogen, methyl or C.sub.1-2 alkoxy, and Q.sup.1 is cyano or C.sub.1-4 alkylcarbonyl; ##STR5## wherein P is formyl, nitro or cyano, Q.sup.2 is cyano or nitro, T is halogen, methyl, phenyl or methylsulfonyl, X.sup.5 is as defined above, and Y.sup.3 is hydrogen or C.sub.1-2 alkoxy.
    Type: Grant
    Filed: March 7, 1995
    Date of Patent: June 18, 1996
    Assignee: Dystar Japan Ltd.
    Inventors: Kiyoshi Himeno, Toshio Hihara, Ryouichi Sekioka
  • Patent number: 5505742
    Abstract: A method for dyeing hydrophobic fibers black, wherein a mixed black dye is used which comprises a blue color component containing at least 70 wt % of a disperse dye of the following formula (I): ##STR1## wherein X is a chlorine atom or a bromine atom, and R is a methyl group or an ethyl group.
    Type: Grant
    Filed: December 20, 1994
    Date of Patent: April 9, 1996
    Assignee: Dystar Japan Ltd.
    Inventors: Kiyoshi Himeno, Kazuhisa Konishi, Ryouichi Sekioka
  • Patent number: 5494492
    Abstract: A disperse dye composition comprising compounds of the formulae (I) and (II): ##STR1## wherein each of R.sup.1 and R.sup.5 is a methyl group or an ethyl group, and each of R.sup.2, R.sup.3 and R.sup.4 is a C.sub.1-5 alkyl group, wherein the weight ratio of the compound of the formula (I) to the compound of the formula (II) is within a range of from 95:5 to 5:95.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: February 27, 1996
    Assignee: Dystar Japan Ltd.
    Inventors: Kiyoshi Himeno, Kazuhisa Konishi, Ryouichi Sekioka
  • Patent number: 5340930
    Abstract: A monoazodye of the following formula (I): ##STR1## wherein R.sup.1 is hydrogen, methyl or chlorine, R.sup.2 is hydrogen or methyl, R.sup.3 is C.sub.1 -C.sub.5 alkyl, R.sup.4 is phenyl, benzyl, phenoxy, C.sub.1 -C.sub.5 alkoxy, C.sub.1 -C.sub.5 alkyl or benzyloxy, provided that when R.sup.4 is alkyl, the total number of carbon atoms of R.sup.3 and R.sup.4 is at least 4.The monoazo dye of the present invention can be used to dye fibers such as polyester fibers, blended yarn products or combined filament yarn products such as polyester fibers with natural fibers.
    Type: Grant
    Filed: June 3, 1992
    Date of Patent: August 23, 1994
    Assignee: Hoechst Mitsubishi Kasei Co., Ltd.
    Inventors: Kiyoshi Himeno, Ryouichi Sekioka
  • Patent number: 5304222
    Abstract: A disperse dye mixture comprising from 20 to 80% by weight of a red disperse dye of the following formula (A) and from 20 to 80% by weight of a red disperse dye of the following formula (B): ##STR1## wherein R.sup.1 is --C.sub.2 H.sub.5 or --C.sub.2 H.sub.4 OCOCH.sub.3, R.sup.2 is --C.sub.2 H.sub.4 OCOCH.sub.3 or --C.sub.2 H.sub.4 CN, and R.sup.3 is hydrogen or --CH.sub.3.
    Type: Grant
    Filed: June 17, 1992
    Date of Patent: April 19, 1994
    Assignee: Hoechst Mitsubishi Kasei Co., Ltd.
    Inventors: Ryouichi Sekioka, Kouichi Seto
  • Patent number: 5278294
    Abstract: A monoazodye of the following formula (I): ##STR1## wherein X is CN, Cl or Br, one of R.sup.1 and R.sup.2 is phenyl and the other is --C.sub.2 H.sub.4 OC.sub.2 H.sub.4 OR.sup.3, wherein R.sup.3 is C.sub.1 -C.sub.5 alkyl, formyl, C.sub.2 -C.sub.6 alkylcarbonyl or C.sub.2 -C.sub.6 alkoxycarbonyl.
    Type: Grant
    Filed: May 26, 1992
    Date of Patent: January 11, 1994
    Assignee: Hoechst Mitsubishi Kasei Co., Ltd.
    Inventors: Kiyoshi Himeno, Ryouichi Sekioka
  • Patent number: RE46018
    Abstract: The present invention relates to dye mixtures comprising at least one compound of the formula (I) and at least one compound of the formula (II) where the substituents are each as defined in the description part, which are highly useful for dyeing and printing hydrophobic synthetic material.
    Type: Grant
    Filed: January 10, 2014
    Date of Patent: May 31, 2016
    Assignee: DyStar Colours Distribution GmbH
    Inventors: Manfred Hoppe, Kiyoshi Himeno, Ryouichi Sekioka