Patents by Inventor Nagayasu Yanata

Nagayasu Yanata 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).

  • Electrolytic refining method for gallium and apparatus for use in the method
    Patent number: 6221232
    Abstract: An electrolytic refining method for gallium by depositing refined gallium on a cathode in an electrolytic solution using a melted raw gallium material as an anode in an electrolytic cell is disclosed, comprising applying a centrifugal force to the melted raw gallium material and discharging out a scum gathered in the central portion of the cell.
    Type: Grant
    Filed: October 28, 1999
    Date of Patent: April 24, 2001
    Assignee: Dowa Mining Co., Ltd.
    Inventors: Kenichi Tayama, Nagayasu Yanata, Kishio Tayama