Patents by Inventor John W. Rowson

John W. Rowson 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 the enhanced production of silver from gold and silver bearing ore
    Patent number: 5034055
    Abstract: There is disclosed a process for recovering gold and silver values from ore using activated carbon for adsorbing the values, wherein the activated carbon is treated with a suitable oxidant having an oxidation potential higher than that of oxygen. A preferred oxidant is potassium permanganate. Activated carbon so treated has an enhanced affinity for adsorbing silver, even under conditions which traditionally have favored loading of carbon with gold.
    Type: Grant
    Filed: July 25, 1990
    Date of Patent: July 23, 1991
    Assignee: Cluff Mining
    Inventor: John W. Rowson