Patents by Inventor Yoshiki Hishiro

Yoshiki Hishiro 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).

  • Color filter
    Patent number: 5478680
    Abstract: A color filter having the thickness of 3 .mu.m or smaller and, on a substrate, having color filter elements which have different colors each other and are made from a resist compositions comprising an alkali soluble resin and dyes having a specific color within the wave length range from 400 nm to 700 nm, wherein each of the color filter elements has the minimum light transmittance of 25% or smaller, and the color filter is excellent in various properties such as resolution, color tone, color reproductivity and color depth and it has a small thickness.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: December 26, 1995
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yoshiki Hishiro, Naoki Takeyama, Shigeki Yamamoto