Patents by Inventor Hajime Sugita

Hajime Sugita 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).

  • Ink-jet recording method
    Patent number: 8142842
    Abstract: The present invention relates to a ink-jet recording method for printing with a glycol ink which contains 60 parts by weight or more of glycol ether based on 100 parts by weight of the ink, comprising printing by ejecting the glycol ink on an ink-jet recording material, wherein the ink-jet recording material comprises a support, at least one porous ink-receptive layer which contains inorganic fine particles having an average secondary particle size of 500 nm or less and a resin binder provided on the support, and a front surface layer containing an acrylic resin emulsion provided on the ink-receptive layer.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: March 27, 2012
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Hajime Sugita, Shigeki Shino
  • Ink-jet recording method
    Publication number: 20080095948
    Abstract: The present invention relates to a ink-jet recording method for printing with a glycol ink which contains 60 parts by weight or more of glycol ether based on 100 parts by weight of the ink, comprising printing by ejecting the glycol ink on an ink-jet recording material, wherein the ink-jet recording material comprises a support, at least one porous ink-receptive layer which contains inorganic fine particles having an average secondary particle size of 500 nm or less and a resin binder provided on the support, and a front surface layer containing an acrylic resin emulsion provided on the ink-receptive layer.
    Type: Application
    Filed: October 23, 2007
    Publication date: April 24, 2008
    Inventors: Hajime Sugita, Shigeki Shino
  • Silica dispersion, method for preparing the same and method for making ink-jet recording material using the same
    Patent number: 6403162
    Abstract: Disclosed are a method for making an ink-jet recording material which comprises adding silica fine particles having an average primary particle diameter of 50 nm or less to a dispersion medium mainly comprising water containing a cationic polymer having a weight average molecular weight of 100,000 or less and mixing to prepare a slurry of silica fine particles; dispersing the slurry of silica fine particles by a dispersing machine to prepare a dispersion of silica fine particles; mixing the dispersion of silica fine particles with at least a hydrophilic binder to prepare a coating solution for forming an ink-receptive layer; and coating the coating solution for forming an ink-receptive layer on a support and drying, a method for preparing a dispersion of silica fine particles and the silica dispersion.
    Type: Grant
    Filed: July 5, 2000
    Date of Patent: June 11, 2002
    Assignee: Mitsubishi Paper Mills Limited
    Inventors: Yukio Tokunaga, Tetsuya Ashida, Hajime Sugita