Patents by Inventor Edward R. Peasley

Edward R. Peasley 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).

  • Recovery of platinum-group metals from ores
    Patent number: 4337226
    Abstract: Metal values are recovered from ore concentrates by means of dry grinding, followed by a two-stage leaching process in which the ground concentrate is first leached with sulfuric acid at a temperature of about 90.degree. to 100.degree. C. to selectively leach nickel and iron. The residue is then leached with a solution comprising sulfuric acid and NaOCl or H.sub.2 O.sub.2 to extract platinum, palladium, copper and gold.
    Type: Grant
    Filed: February 11, 1981
    Date of Patent: June 29, 1982
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Edward R. Peasley, John M. Gomes