Patents by Inventor Tomohiro Gotoh

Tomohiro Gotoh 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).

  • Process for producing hydrogen fluoride
    Patent number: 4491571
    Abstract: A process for producing hydrogen fluoride with use of fluorite as starting material and by conducting reactions in a first reactor and a second reactor wherein a reaction of fluorite with sulfuric acid, sulfuric anhydride and steam in the first reactor is conducted at a conversion of from 35 to 90% while maintaining the reaction temperature within a range of from 140.degree. to 240.degree. C. by controlling the respective amounts of the sulfuric anhydride, steam and sulfuric acid.
    Type: Grant
    Filed: June 6, 1983
    Date of Patent: January 1, 1985
    Assignee: Asahi Glass Company Ltd.
    Inventors: Kaichiro Suzuki, Keiichi Nakaya, Tomohiro Gotoh, Masayuki Kitasako, Masaharu Iwasaki