Patents by Inventor Walter L. Staker

Walter L. Staker 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).

  • Decomposition of chalcopyrite
    Patent number: 3985555
    Abstract: Chalcopyrite is decomposed by treatment with aqueous acid solution and a metallic reductant to form either metallic copper or copper sulfide, ferrous iron and hydrogen sulfide.
    Type: Grant
    Filed: January 23, 1975
    Date of Patent: October 12, 1976
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Monte B. Shirts, Walter L. Staker