Patents by Inventor Hisashi Uraki

Hisashi Uraki 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).

  • Inkjet recording liquid and process for the production thereof
    Patent number: 6235099
    Abstract: A water-dispersed inkjet recording liquid excellent in water resistance and transparency and also excellent in the property of ejection from a nozzle, containing, as a colorant, a water-based dispersion of an organic pigment (A) which is at least one member selected from the group consisting of a quinacridone pigment, a benzimidazolone pigment, an insoluble azo pigment, a fuzed azo pigment, a quinophthalone pigment, a naphthol pigment, a perylene pigment and an isoindolinone pigment and has an average particle diameter of 10 to 150 nm (measured by laser scattering), the water-based dispersion of the organic pigment (A) being obtained by mechanically kneading a mixture containing at least three components of the organic pigment (A), a water-soluble inorganic salt (B) in an amount by weight at least three times as large as the amount of the organic pigment (A) and a water-soluble solvent (C) to finely mill the organic pigment (A), and then removing the water-soluble inorganic salt (B) and the water-soluble solv
    Type: Grant
    Filed: July 28, 1997
    Date of Patent: May 22, 2001
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Seiji Aida, Tsutomu Fujigamori, Hisashi Uraki, Ichiro Toyoda, Sunao Satake, Seiji Sawada, Yasuharu Iida
  • Inkjet recording liquid and process for the production thereof
    Patent number: 6031024
    Abstract: An inkjet recording ink having excellent water resistance and having excellent ejection stability through a nozzle, which ink is obtained by dispersing colorant particles in a water-based liquid, the colorant particles being a product formed by coating each of resin particles having an average particle diameter of 50 to 300 nm with an organic pigment.
    Type: Grant
    Filed: February 24, 1998
    Date of Patent: February 29, 2000
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Hisashi Uraki, Seiji Sawada, Yasuharu Iida, Sunao Satake, Tsutomu Fujigamori, Seiji Aida
  • Water-based ink-jet recording fluid
    Patent number: 5972087
    Abstract: By use of recording liquid for water based inkjet with pigment and colloidal silica, it is possible to obtain prints print recorded on plain paper with good clearness and high quality and image of the print recorded material with sufficient water resistance and light resistance.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: October 26, 1999
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Hisashi Uraki, Ichiro Toyoda, Shigeyuki Ehashi, Seiji Aida, Yasuharu Iida, Seiji Sawada, Akio Sato
  • Surface-treated organic pigment and process for the production thereof
    Patent number: 5928419
    Abstract: A surface-treated organic pigment excellent in initial dispersibility and long-term dispersion stability in water and an organic solvent and free from the coagulation of pigment particles, obtained by reacting a sulfonating agent with an organic pigment dispersed in a solvent in which the organic pigment is insoluble or sparingly soluble, and thereby introducing a sulfonic acid group to the surface of each particle of the organic pigment.
    Type: Grant
    Filed: October 6, 1997
    Date of Patent: July 27, 1999
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Toshiyuki Uemura, Tsukasa Iguchi, Sunao Satake, Hisashi Uraki, Yasuharu Iida
  • Recording fluid for ink-jet printing and process for the production thereof
    Patent number: 5716435
    Abstract: A water-dispersed inkjet recording liquid excellent in water resistance and transparency and also excellent in the property of ejection from a nozzle, containing, as a colorant, a water-based dispersion of an organic pigment (A) having an average particle diameter of 10 to 150 nm (measured by laser scattering), the water-based dispersion of the organic pigment (A) being obtained by mechanically kneading a mixture containing at least three components, said components being, the organic pigment (A), a water-soluble inorganic salt (B) in an amount by weight at least three times as large as the amount of the organic pigment (A) and a water-soluble solvent (C) to finely mill the organic pigment (A), and then removing the water-soluble inorganic salt (B) and the water-soluble solvent (C) by washing the kneaded mixture with water, and a process for the production thereof.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: February 10, 1998
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Seiji Aida, Tsutomu Fujigamori, Hisashi Uraki, Ichiro Toyoda, Sunao Satake, Seiji Sawada, Yasuharu Iida