Patents by Inventor Youichi Shirakawa

Youichi Shirakawa 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).

  • Electrically conductive ceramic material, a process of producing same, and an electrostatic chuck
    Patent number: 6631062
    Abstract: An electrically conductive ceramics comprises a compound containing at least one element belonging to the Group 3A of the periodic table and TiO2−x (0<x<2) in a range such that the TiO2−x (0<x<2) accounts for 1 to 60 wt % of the total amount of the ceramics, and at least part of the compound and the TiO2−x form a composite oxide.
    Type: Grant
    Filed: December 6, 1999
    Date of Patent: October 7, 2003
    Assignees: Nihon Ceratec Co., Ltd., Taiheiyo Cement Corporation
    Inventors: Kazuyoshi Minamisawa, Hiroyuki Matsuo, Sari Endoh, Yukio Kishi, Kazunori Saitoh, Hiroshi Suzuki, Motohiro Umezu, Mamoru Ishii, Hironori Ishida, Youichi Shirakawa, Norikazu Sashida