Patents by Inventor Izuru Sugano

Izuru Sugano 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 extracting heavy metals from industrial waste waters
    Patent number: 3931007
    Abstract: A method is provided for extracting metal impurities from waste water to which ferrous ions are added to provide at least two times the amount of ferrous ions on the mol basis to the amount of metal ions present, the resulting solution containing acid radicals, a base being added to the solution to raise the pH to form a suspension of metal hydroxides, following which an oxidizing gas is bubbled in solution to form crystals containing ferric ions and further containing the metal ions originally in solution, the precipitated crystals being thereafter separated to provide clean water.
    Type: Grant
    Filed: December 17, 1973
    Date of Patent: January 6, 1976
    Assignee: Nippon Electric Company Limited
    Inventors: Izuru Sugano, Toshiro Tsuji, Masaru Kanamori