Patents by Inventor Toshinao Fujita

Toshinao Fujita 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).

  • Refining process of organic tin (IV) polyhalides
    Patent number: 5200540
    Abstract: It is possible to eliminate organic tin(IV) monohalide from organic tin(IV) polyhalide containing the monohalide so that it can not be detected in sensitivity of ordinary gas chromatography by treating with hydrochloric acid, hydrogen chloride or chlorine.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: April 6, 1993
    Assignee: Koriyama Kasei Co., Ltd.
    Inventors: Yasuyuki Suzuki, Yuji Watanabe, Toshinao Fujita, Naruo Den