Patents by Inventor Katsutake Fukuda

Katsutake Fukuda 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 oxidation treatment of FE.sup.2+ in waste water
    Patent number: 4139456
    Abstract: Improved process for the oxidation of the Fe.sup.2+ in waste water is disclosed. The process is especially advantageous when applied to low pH acidic waste waters containing substantial amount of the Fe.sup.2+ and is carried out by making use of acid-proof, porous material as a bed-material for iron bacteria to inhabit. The bed-material is suspended in the waste water to be treated and is used repeatedly in a closed circuit.
    Type: Grant
    Filed: July 15, 1977
    Date of Patent: February 13, 1979
    Assignee: Dowa Mining Co., Ltd.
    Inventors: Eizo Yabuuchi, Katsutake Fukuda