Patents by Inventor Syoichi Sasaki

Syoichi Sasaki 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).

  • Production of color filter
    Patent number: 5827626
    Abstract: A color filter having excellent optical properties can be produced in high yield using a photo-sensitive composition comprising (a) a resin, (b) one or more pigments, (c) one or more monomers, and (d) a photoinitiator to form a film on a substrate, followed by exposure to light and development using a specific developer containing ##STR1## wherein R.sup.1 is C.sub.1-19 alkyl; and R.sup.2 is C.sub.1-19 alkylene.
    Type: Grant
    Filed: March 8, 1996
    Date of Patent: October 27, 1998
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Yuji Kobayashi, Shigeo Tachiki, Toshihiko Akahori, Syoichi Sasaki, Kouji Yamazaki, Yoichi Kimura
  • Colored image forming material and color filter obtained therefrom
    Patent number: 5821016
    Abstract: In a colored image forming material comprising (a) a copolymer containing a carboxyl group, (b) a coloring agent, (c) a monomer containing at least one photopolymerizable unsaturated bond in the molecule, (d) a photoinitiator and, when required, (e) a specific sensitizer, the dispersion stability of pigment and the optical sensitivity can be considerably increased by using a specific copolymer of styrene derivative-maleic acid derivative as component (a) and specific benzoimidazole or benzothiazole as component (e), and a photosensitive element or a color filter with distinguished optical characteristics can be obtained therefrom.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: October 13, 1998
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Tsutomu Satoh, Shigeo Tachiki, Yuji Kobayashi, Toshihiko Akahori, Syoichi Sasaki, Kouji Yamazaki, Yoichi Kimura