Patents by Inventor Tomomichi Kudo

Tomomichi Kudo 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).

  • Method of removal of arsenic from a sulfuric acid solution
    Patent number: 4241039
    Abstract: A method of removal of arsenic from an acidic solution, in which ferrous ions contained in the solution are oxidized in the presence of high pressured oxygen and sulfuric acid to ferric ions, the solution with said ferric ions being mixed with the solution which has not subjected to oxidation, and the mixture of said solutions being controlled of its pH whereby ferric hydroxide is precipitated, which coprecipitates and adsorbs arsenic thereto.
    Type: Grant
    Filed: December 8, 1978
    Date of Patent: December 23, 1980
    Assignee: Dowa Mining Co. Ltd.
    Inventors: Shiro Koh, Tomomichi Kudo, Michihiro Maeshima, Tamotsu Kibayashi