Patents by Inventor Eiichi Ogawa

Eiichi Ogawa 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: 7029503
    Abstract: The present invention provides a disazo compound which in a free acid form is represented by the formula (1) and which has high ability to dye cellulosic fibers and attains efficient dyeing with satisfactory reproducibility; and a method of dyeing cellulosic fibers with the compound. Also provided are: a reactive dye composition comprising a compound represented by the formula (1) and a specific red reactive dye and/or a specific blue reactive dye; and a method of dyeing cellulosic fibers with the composition. In the formula, R1 and R3 each represents hydrogen atom or methoxy group; R2 and R4 each represents hydrogen atom, methyl group, acetylamino group, ureido group, etc.; and m is 2 or 3.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: April 18, 2006
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Junji Odani, Eiichi Ogawa, Yasuo Shirasaki
  • Publication number: 20040117924
    Abstract: The present invention provides a disazo compound which in a free acid form is represented by the formula (1) and which has high ability to dye cellulosic fibers and attains efficient dyeing with satisfactory reproducibility; and a method of dyeing cellulosic fibers with the compound. Also provided are: a reactive dye composition comprising a compound represented by the formula (1) and a specific red reactive dye and/or a specific blue reactive dye; and a method of dyeing cellulosic fibers with the composition.
    Type: Application
    Filed: December 24, 2003
    Publication date: June 24, 2004
    Inventors: Junji Odani, Eiichi Ogawa, Yasuo Shirasaki
  • Patent number: 6653454
    Abstract: The present invention relates to a novel blue dye compound represented by Formula (1) as shown below, which can be synthesized without a dianisidine compound used for a raw material and can dye a cellulosic high molecular material to provide the blue dyed product that has a high color value, a good build-up and various kinds of good fastness; a method for dyeing a cellulosic high molecular material by using the same; and a cellulosic high molecular material dyed with the same. A formazan compound represented by (In Formula (1), R1 is hydrogen, sulfo, hydroxy, chloro, methoxy, carboxyl or alkyl; either of R2 and R3 is hydrogen and the other is sulfo; X is morpholino, 2-hydroxyethylamino or bis(2-hydroxyethyl)amino; and Y is a phenylene diimino represented by Formula (2) as shown below (In Formula (2), R4 is sulfo or carboxyl)) or the salt thereof.
    Type: Grant
    Filed: October 1, 2002
    Date of Patent: November 25, 2003
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Mariko Umeda, Hideshiro Nomura, Yasuo Shirasaki, Eiichi Ogawa
  • Patent number: 6485551
    Abstract: A method of printing a polyamide structure using two or more of water-soluble dye with an inorganicity/organicity value of 1 to 7 selected so that the ones with the largest and smallest inorganicity/organicity values show a difference of 2 or below between their two such values, to allow the polyamide structure to be printed with no uneven color, high color reproducibility and excellent ink bleeding prevention.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: November 26, 2002
    Assignees: Seiren Co., Ltd., Nippon Kayaku Kabushiki Kaisha
    Inventors: Takahiro Kohsaka, Eiichi Ogawa
  • Patent number: 6086640
    Abstract: For dyeing (printing, for example) cellulose fibers with a reactive dye, a blue compound is greatly desired, the blue compound being capable of generating a product dyed in blue at excellent dyeing reproducibility and with good light fastness and superior fastness against chlorine water, involving less staining of white area. The invention relates to a formazan compound in a free acid form as represented by the following formula I, a dyeing method of cellulose fibers using the same and a final dyed product prepared by the method, characterized in that the compound, the method and the product are suitable so as to overcome the problem.Formula I ##STR1## (wherein R represents hydrogen, sulfo group, hydroxyl group, halogen, a C1-C4 alkyl group, a C1-C4 alkoxyl group or carboxyl group; and M represents copper or nickel.
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: July 11, 2000
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Toru Tabei, Eiichi Ogawa, Shin-ichi Namba
  • Patent number: 5942011
    Abstract: This invention relates to a method of dyeing fibers containing polyester fibers characterized by their exhaustion dyeing in an alkaline aqueous medium, and a dyeing assistant for fibers containing polyester fibers which is effective for carrying out the dyeing method, and which is characterized by containing a compound represented by formula (I) ##STR1## (where R is H or CH3, n is 1 to 3, and X is H, an alkali metal, or an organic base).Moreover, this invention relates to a dyed product of fibers containing polyester fibers as dyed by the method mentioned above.
    Type: Grant
    Filed: February 2, 1998
    Date of Patent: August 24, 1999
    Assignee: Nippon Kayaku Co., Ltd.
    Inventors: Yasuo Shirasaki, Eiichi Ogawa, Yoshikazu Aizawa, Shigemitsu Yabe
  • Patent number: 5545281
    Abstract: An integrated circuit connecting method that includes connecting electrode pads on an integrated circuit device to electrode terminals on a base with metal bumps interposed, the electrode terminals being formed in registry with the electrode pads.
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: August 13, 1996
    Assignees: NEC Corporation, Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Koji Matsui, Mitsuru Kimura, Kazuaki Utsumi, Eiichi Ogawa, Hiroshi Komano, Toshimi Aoyama
  • Patent number: 5318651
    Abstract: A method of bonding first and second circuit boards includes applying a light-sensitive adhesive over the first electrodes on a first circuit board and the areas where the first electrodes are not formed, and drying the applied adhesive to form a light-sensitive adhesive layer having the light-sensitive adhesive layer exposed selectively to active rays of light and performing development to remove only the light-sensitive adhesive layer on the first electrodes, and then performing a heat treatment to impart bonding quality to the light-sensitive adhesive layer remaining between adjacent first electrodes, placing the first and second circuit boards one on top of the other and thermocompressing the two circuit boards to have the first electrodes connected electrically to the second electrodes to form a single circuit board; and performing a heat treatment and/or exposure to active rays of light on the formed single circuit board.
    Type: Grant
    Filed: November 19, 1992
    Date of Patent: June 7, 1994
    Assignees: Nec Corporation, Tokyo Ohka Kogyo Co., Ltd.
    Inventors: Koji Matsui, Mitsuru Kimura, Kazuaki Utsumi, Eiichi Ogawa, Hiroshi Komano, Toshimi Aoyama
  • Patent number: 5032140
    Abstract: A reactive dye represented by the formula (I), ##STR1## wherein R represents --NH.sub.2 or --NHC.sub.2 H.sub.4 SO.sub.3 M, and M's independently represent Li.sup..sym., Na.sup..sym., K.sup..sym. or .sup..sym. NH(C.sub.2 H.sub.4 OH).sub.3, provided that at least one of M's represents Li.sup..sym. or .sup..sym. NH(C.sub.2 H.sub.4 OH).sub.3. This reactive dye easily gives a stable liquid composition and is useful to dye cellulosic or polyamide fibers.
    Type: Grant
    Filed: October 24, 1989
    Date of Patent: July 16, 1991
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Nobuyuki Yamanaka, Kazuo Hanawa, Eiichi Ogawa
  • Patent number: 4667021
    Abstract: A chromium complex compound represented as the free acid form by the formula (I): ##STR1## wherein X.sup.1 represents a hydrogen atom, a methyl group, a methoxy group or a sulfonic acid group; X.sup.2, X.sup.3 and X.sup.4 represent independently a hydrogen atom, a chlorine atom, a methyl gorup, a methoxy group, a carboxyl group or a sulfonic acid group; Y represents a hydrogen atom or a sulfonic acid group; Z represents a chlorine atom, a fluorine atom or --N.sup.30 (R).sub.3 (R represents a C.sub.1 to C.sub.4 -alkyl group), ##STR2## and M represents a hydrogen atom or an alkali metal, a process for producing the chromium complex compound (I) and a method for dyeing cellulosic fibers with the same. The chromium complex compound represented by formula (I) is excellent in affinity to cellulosic fibers and in color-yield, build-up properties and fastness properties. These compounds are dyes for cellulosic fibers.
    Type: Grant
    Filed: September 26, 1984
    Date of Patent: May 19, 1987
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Junji Toda, Eiichi Ogawa