Patents by Inventor Tatsuya Ishigaki, legal representative

Tatsuya Ishigaki, legal representative 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).

  • Catalyst and process for decomposing carbonyl sulfide and hydrogen cyanide
    Patent number: 7429366
    Abstract: A solution of a chromium compound is impregnated into a silica-alumina carrier made of alumina and containing 1 to 5 weight % of silica relative to the weight of the carrier, thereby to obtain a decomposing catalyst carrying 10 to 15 weight % of chromium oxide relative to the weight of the catalyst in terms of Cr2O3. By contacting mixed gas obtained through partial oxidation of heavy oil and/or coal with the decomposing catalyst, COS and HCN contained in the mixed gas are decomposed/removed. In this case, transition of alumina into boehmite can be suppressed owing to coexistence of silica and chromium oxide, so that COS and HCN can be decomposed by highly active catalytic reactions over a long time.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: September 30, 2008
    Assignees: JGC Corporation, Catalysts & Chemicals Industries Co., Ltd, Sud-Chemie Catalysts Japan, Inc.
    Inventors: Satomi Ishigaki, legal representative, Aya Ishigaki, legal representative, Akane Ishigaki, legal representative, Tatsuya Ishigaki, legal representative, Eiichi Hosoya, Kazutaka Egami, Shinya Ishigaki