Patents by Inventor Hiroko Hayashi

Hiroko Hayashi 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: 11866596
    Abstract: An aqueous ink jet composition of the present disclosure includes: at least one dye selected from the group consisting of C.I. Solvent Yellow 160:1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of an ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of a polyalkylene glycol; and an anionic dispersant.
    Type: Grant
    Filed: January 29, 2020
    Date of Patent: January 9, 2024
    Inventors: Kenji Kitada, Hiroko Hayashi, Yasunari Ikeda, Hisashi Okamura, Kenta Kikuchi, Hirofumi Hokari, Shinichi Naito, Kazumasa Otsuki, Michio Nakamori, Shinichi Yamamoto, Seiji Kagami, Shigeki Kawada
  • Patent number: 11591489
    Abstract: An aqueous ink jet composition contains: C.I. Disperse Red 364; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of the ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of the polyalkylene glycol; and an anionic dispersant.
    Type: Grant
    Filed: December 26, 2019
    Date of Patent: February 28, 2023
    Inventors: Hisashi Okamura, Hiroko Hayashi, Kenji Kitada, Yasunari Ikeda, Hirofumi Hokari, Shinichi Yamamoto, Michio Nakamori, Shigeki Kawada, Kenta Kikuchi, Kazumasa Otsuki, Seiji Kagami, Shinichi Naito
  • Patent number: 11447649
    Abstract: An aqueous ink jet composition includes a first component which is at least one selected from the group consisting of C.I. Solvent Yellow 160: 1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184; a second component which is a dispersant having at least one chemical structure of a sulfo group and a salt thereof; and a third component which has a coumarin skeleton and at least one chemical structure of a sulfo group and a salt thereof.
    Type: Grant
    Filed: May 14, 2019
    Date of Patent: September 20, 2022
    Inventors: Yasunari Ikeda, Hiroko Hayashi, Kenji Kitada, Hirofumi Hokari, Hisashi Okamura, Kenta Kikuchi, Shinichi Naito
  • Patent number: 11384249
    Abstract: An aqueous ink jet composition contains at least one disperse dye selected from the group consisting of C.I. Disperse Yellow 54, C.I. Disperse Red 60, and C.I. Disperse Blue 359, and a styrene maleic acid-based dispersing agent represented by Formula (1).
    Type: Grant
    Filed: March 27, 2019
    Date of Patent: July 12, 2022
    Assignee: SEIKO EPSON CORPORATION
    Inventors: Kenji Kitada, Hiroko Hayashi, Yasunari Ikeda, Hirofumi Hokari, Hisashi Okamura, Kenta Kikuchi, Seiji Kagami, Shinichi Naito
  • Publication number: 20200239718
    Abstract: An aqueous ink jet composition of the present disclosure includes: at least one dye selected from the group consisting of C.I. Solvent Yellow 160:1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of an ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of a polyalkylene glycol; and an anionic dispersant.
    Type: Application
    Filed: January 29, 2020
    Publication date: July 30, 2020
    Inventors: Kenji KITADA, Hiroko HAYASHI, Yasunari IKEDA, Hisashi OKAMURA, Kenta KIKUCHI, Hirofumi HOKARI, Shinichi NAITO, Kazumasa OTSUKI, Michio NAKAMORI, Shinichi YAMAMOTO, Seiji KAGAMI, Shigeki KAWADA
  • Publication number: 20200207999
    Abstract: An aqueous ink jet composition contains: C.I. Disperse Red 364; a material A which is at least one compound selected from the group consisting of a compound represented by the following formula (1), a compound represented by the following formula (2), an ethylene oxide adduct of tristyrylphenol, a derivative of the ethylene oxide adduct of tristyrylphenol, a polyalkylene glycol, and a derivative of the polyalkylene glycol; and an anionic dispersant.
    Type: Application
    Filed: December 26, 2019
    Publication date: July 2, 2020
    Inventors: Hisashi OKAMURA, Hiroko HAYASHI, Kenji KITADA, Yasunari IKEDA, Hirofumi HOKARI, Shinichi YAMAMOTO, Michio NAKAMORI, Shigeki KAWADA, Kenta KIKUCHI, Kazumasa OTSUKI, Seiji KAGAMI, Shinichi NAITO
  • Patent number: 10676626
    Abstract: An ink jet textile printing ink composition includes water; a color material; and a metal chelating agent. In the ink composition described above, the metal chelating agent includes at least one selected from methyl glycine diacetic acid, L-glutamate diacetic acid, L-aspartic diacetic acid, hydroxyethylimino diacetic acid, 3-hydroxy-2,2?-iminodisuccucinic acid, dicarboxymethyl glutamic acid, (S,S)-ethylenediaminedisuccinic acid, and salts thereof, and the pH of the ink composition is 6 to 10.
    Type: Grant
    Filed: September 26, 2017
    Date of Patent: June 9, 2020
    Assignee: Seiko Epson Corporation
    Inventors: Hiroko Hayashi, Tetsuya Aoyama, Makoto Nagase
  • Publication number: 20190352525
    Abstract: An aqueous ink jet composition includes a first component which is at least one selected from the group consisting of C.I. Solvent Yellow 160: 1, C.I. Disperse Yellow 82, and C.I. Disperse Yellow 184; a second component which is a dispersant having at least one chemical structure of a sulfo group and a salt thereof; and a third component which has a cumarin skeleton and at least one chemical structure of a sulfo group and a salt thereof.
    Type: Application
    Filed: May 14, 2019
    Publication date: November 21, 2019
    Inventors: Yasunari IKEDA, Hiroko HAYASHI, Kenji KITADA, Hirofumi HOKARI, Hisashi OKAMURA, Kenta KIKUCHI, Shinichi NAITO
  • Publication number: 20190300736
    Abstract: An aqueous inkjet composition contains at least one disperse dye selected from the group consisting of C.I. Disperse Yellow 54, C.I. Disperse Red 60, and C.I. Disperse Blue 359, and a styrene maleic acid-based dispersing agent represented by Formula (1).
    Type: Application
    Filed: March 27, 2019
    Publication date: October 3, 2019
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Kenji KITADA, Hiroko HAYASHI, Yasunari IKEDA, Hirofumi HOKARI, Hisashi OKAMURA, Kenta KIKUCHI, Seiji KAGAMI, Shinichi NAITO
  • Patent number: 10047234
    Abstract: There is provided an ink set including at least: a yellow ink; a magenta ink; and a cyan ink, in which the yellow ink includes one or more kinds selected from a group consisting of coloring materials represented by the following Formulae (Y-1) and (Y-2), the magenta ink includes one or more kinds selected from a group consisting of coloring materials represented by the following Formulae (M-1) and (M-2), and the cyan ink includes one or more kinds selected from a group consisting of coloring materials represented by the following Formulae (C-1) and (C-2).
    Type: Grant
    Filed: July 23, 2015
    Date of Patent: August 14, 2018
    Assignee: Seiko Epson Corporation
    Inventors: Hiromi Ohori, Ryosuke Teramoto, Yuho Miyake, Miharu Kanaya, Hiroko Hayashi, Daisuke Ishihara
  • Publication number: 20180086929
    Abstract: An ink jet textile printing ink composition includes water; a color material; and a metal chelating agent. In the ink composition described above, the metal chelating agent includes at least one selected from methyl glycine diacetic acid, L-glutamate diacetic acid, L-aspartic diacetic acid, hydroxyethylimino diacetic acid, 3-hydroxy-2,2?-iminodisuccucinic acid, dicarboxymethyl glutamic acid, (S,S)-ethylenediaminedisuccinic acid, and salts thereof, and the pH of the ink composition is 6 to 10.
    Type: Application
    Filed: September 26, 2017
    Publication date: March 29, 2018
    Inventors: Hiroko HAYASHI, Tetsuya AOYAMA, Makoto NAGASE
  • Patent number: 9725608
    Abstract: An ink jet recording ink has excellent dispersion stability and ejection stability and is capable of providing images free from bleeding. Such an ink exhibits excellent color development and rubbing resistance. The ink jet recording ink comprises a pigment dispersed by a polymer; water; at least one compound selected from the group consisting of an acetylene glycol surfactant and an acetylene alcohol surfactant; and 1,2-hexanediol. The pigment dispersed by the polymer is produced by a phase conversion emulsification, an emulsion polymerization, an acid deposition or a forced emulsification. The ink has a surface tension between 25 mN/m and 45 mN/m.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: August 8, 2017
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Yatake, Toshiyuki Miyabayashi, Hiroko Hayashi
  • Patent number: 9382438
    Abstract: An ink composition for ink jet recording includes a penetrant for ink jet recording that includes a compound represented by the following formula (1) and 1% by mass or less of alcohol represented by the following formula (2). CmH2m+1—O—(CH2—CH2—O)n—H??(1) (in the formula (1), m represents an integer of 5 to 10; and n represents an integer of 2 to 15) CmH2m+1—OH??(2) (in the formula (2), m represents an integer of 5 to 10).
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: July 5, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Tomoyuki Okuyama, Masahiro Yatake, Hiroko Hayashi
  • Patent number: 9365726
    Abstract: The ink composition of the invention is applied to a region to which a color ink composition has been applied. The ink composition contains a weather resistance enhancer, is substantially free from a colorant, and is applied to a recording medium to form a coating film exhibiting an integrated value of light transmittance of not more than 2000 for each nanometer at wavelengths of 320 nm to 360 nm and an integrated value of light transmittance of not less than 36000 for each nanometer at wavelengths of 380 nm to 780 nm.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: June 14, 2016
    Assignee: Seiko Epson Corporation
    Inventors: Daisuke Nishioka, Hiroko Hayashi
  • Publication number: 20140287207
    Abstract: An ink for ink jet recording includes a chelating agent represented by Structural Formula (1) or (2) and water. The ink has a hydrogen ion exponent (pH) of more than 7 and 10 or less.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tomoyuki Okuyama, Hiroko Hayashi
  • Publication number: 20140221536
    Abstract: An aqueous ink ensuring less blurring and high color formation on plain paper, satisfactory color formation and fixing property on special paper and excellent ejection stability is realized by using a microcapsule of a colorant encapsulated with a polymer and rendered dispersible in water and specifying the amount of the aromatic ring in the polymer to be from 20 to 70 wt % of the polymer.
    Type: Application
    Filed: April 11, 2014
    Publication date: August 7, 2014
    Applicant: Seiko Epson Corporation
    Inventors: Masahiro Yatake, Hidehiko Komatsu, Hitoshi Ota, Kazuhiko Hara, Hiroko Hayashi, Jun Ito, Nagatoshi Kasahara, Keiichi Noto
  • Patent number: 8759417
    Abstract: An aqueous ink ensuring less blurring and high color formation on plain paper, satisfactory color formation and fixing property on special paper and excellent ejection stability is realized by using a microcapsule of a colorant encapsulated with a polymer and rendered dispersible in water and specifying the amount of the aromatic ring in the polymer to be from 20 to 70 wt % of the polymer.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: June 24, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Yatake, Hidehiko Komatsu, Hitoshi Ohta, Kazuhiko Hara, Hiroko Hayashi, Jun Ito, Nagatoshi Kasahara, Keiichi Noto
  • Publication number: 20140171558
    Abstract: An ink jet recording ink has excellent dispersion stability and ejection stability and is capable of providing images free from bleeding. Such an ink exhibits excellent color development and rubbing resistance. The ink jet recording ink comprises a pigment dispersed by a polymer; water; at least one compound selected from the group consisting of an acetylene glycol surfactant and an acetylene alcohol surfactant; and 1,2-hexanediol. The pigment dispersed by the polymer is produced by a phase conversion emulsification, an emulsion polymerization, an acid deposition or a forced emulsification. The ink has a surface tension between 25 mN/m and 45 mN/m.
    Type: Application
    Filed: February 25, 2014
    Publication date: June 19, 2014
    Applicant: Seiko Epson Corporation
    Inventors: Masahiro Yatake, Toshiyuki Miyabayashi, Hiroko Hayashi
  • Patent number: 8556400
    Abstract: The present invention aims to provide an ink for ink jet recording that is excellent in storage stability and discharge stability and attains high coloration on regular paper or gloss paper and high glossiness on gloss paper. The ink for ink jet recording of the invention includes: water; and a pigment dispersed by using a polymer which is obtained by polymerizing at least 50% by weight or more of benzylacrylate and 15% by weight or less of (meth)acrylic acid as components of the polymer and has an acid value of no less than 50 mgKOH/g and no more than 120 mgKOH/g and a weight average molecular weight of no less than 10000 and no more than 120000.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: October 15, 2013
    Assignee: Seiko Epson Corporation
    Inventors: Masahiro Yatake, Motoki Masuda, Jyun Ito, Yasuhiro Oki, Hiroko Hayashi
  • Publication number: 20130235134
    Abstract: An ink composition for ink jet recording includes a penetrant for ink jet recording that includes a compound represented by the following formula (1) and 1% by mass or less of alcohol represented by the following formula (2).
    Type: Application
    Filed: March 12, 2013
    Publication date: September 12, 2013
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Tomoyuki Okuyama, Masahiro Yatake, Hiroko Hayashi