Patents by Inventor Roy Duncan Macpherson

Roy Duncan Macpherson 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).

  • Electrowinning process
    Patent number: 4030989
    Abstract: Metals from sulfate leach solutions derived from sulfide ores are electrowon in a cell divided by a permionic membrane whereby metal pregnant solution is fed to the cathode compartment and sulfuric acid is generated in the anode compartment.
    Type: Grant
    Filed: May 11, 1976
    Date of Patent: June 21, 1977
    Assignee: Anglonor S. A.
    Inventors: Milton Graham Montgomery Atmore, Roy Duncan Macpherson