Patents by Inventor Tieh Ma

Tieh Ma 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).

  • Treatment of copper refinery anode slime
    Patent number: 4352786
    Abstract: A process for the removal of lead content in anode slime by subjecting the latter to primary and secondary leach in a medium of an ammonium acetate solution at a temperature not exceeding 80.degree. C. Whereby lead dissolution is maximized and other metals are minimized. Separate the leach solution from the undissolved slime residue, crystallize lead from the separated leach solution and recover the crystallized lead acetate.
    Type: Grant
    Filed: February 24, 1981
    Date of Patent: October 5, 1982
    Assignee: Institute of Nuclear Energy Research
    Inventors: Ying-Chu Hoh, Bao-Dein Lee, Tieh Ma, Wen-Shou Chuang, Wei-Ko Wang