Patents by Inventor Toshiki Furubayashi

Toshiki Furubayashi 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).

  • Coloring composition
    Patent number: 6284432
    Abstract: A coloring composition for a color filter, which comprises (i) an organic pigment, (ii) a binder, and (iii) a pigment derivative which is an organic pigment to which a sulfonate group and a sulfonamide group are bonded or a salt thereof, is provided, and using the coloring composition, a color filter which manifests excellent coat property, has not special color unevenness and has excellent contrast can be produced.
    Type: Grant
    Filed: April 6, 1999
    Date of Patent: September 4, 2001
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshiki Furubayashi, Keisuke Ito, Kaori Yamamoto
  • Black coating composition and application thereof
    Patent number: 5880202
    Abstract: A black coating composition comprising a light-screening material and a macromolecular material wherein the light-screening material consists of particles having a multiple particle size distribution has high light-screening properties, is excellent in storage stability, dispersion stability and coating efficiency, and is satisfactory in other characteristics required of the light-screening thin film of a color filter used in a liquid crystal display device or the like.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: March 9, 1999
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshinobu Yamashita, Koji Tsujimoto, Toshiki Furubayashi, Takeo Tokuda, Kiyoharu Nakatsuka
  • Process for preparation of alumina
    Patent number: 5302368
    Abstract: An aqueous slurry of about 100-1000 centipoises viscosity suspending about 200-2000 g/l of aluminum hydroxide particles smaller than 5 .mu.m is spray-dried, and the dried powders are calcined to obtain alumina powders. The alumina powders have a sharp particle size distribution, being suitable for electronic, abrasive and refractory applications.
    Type: Grant
    Filed: May 28, 1991
    Date of Patent: April 12, 1994
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Takuo Harato, Toshiki Furubayashi, Toshio Ashitani, Toru Ogawa