Patents by Inventor Ithuo Orihara

Ithuo Orihara 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).

  • Treatment of NH.sub.3 -containing gases
    Patent number: 5879646
    Abstract: A waste gas stream containing toxic NF.sub.3 and optionally other gases, such as acidic fluoride gases, for example, HF, SiF.sub.4, MoF.sub.6 and WF.sub.6 is first treated with particles or ribbons of a Cr-containing Fe alloy at about 300.degree.-600.degree. C. to remove the NF.sub.3 content and, if desired, subsequently with an alkaline neutralizing agent in the form of pellets to remove the acidic fluoride contents, if any; said alloy containing preferably about 16-26% Cr and being used in a form of bed packed with said ribbons.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: March 9, 1999
    Assignee: Kanto Denka Kogyo Co., Ltd.
    Inventors: Ithuo Orihara, Moriyuki Fukushima, Eisaku Mogi, Shiro Yamashita