Patents by Inventor Jack Van der Meulen

Jack Van der Meulen 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).

  • Removal of dissolved cadmium and copper from sulphate solution with hydrogen sulfide
    Patent number: 4405570
    Abstract: A process for selectively removing ions of copper and/or cadmium from a sulphate solution containing nickel and/or cobalt values. The solution is treated at a temperature in the range of from about 85.degree. to about 95.degree. C. and at a pH in the range of from about 4.5 to about 5.5 with hydrogen sulphide to precipitate copper and/or cadmium ions as copper and/or cadmium sulphide, and the precipitated copper and/or cadmium sulphide is separated from the solution.
    Type: Grant
    Filed: September 14, 1982
    Date of Patent: September 20, 1983
    Assignee: Sherritt Gordon Mines Limited
    Inventors: Jack Van der Meulen, Donald R. Weir