Patents by Inventor Arthur C. Riese

Arthur C. Riese 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).

  • Metal value recovery from carbonaceous ores
    Patent number: 4801329
    Abstract: A process for recovering a first metal, e.g., gold, from a carbonaceous ore comprising contacting the ore with an added metal component other than an alkali metal or alkaline earth metal component in an amount effective to at least promote the oxidation of carbonaceous material in the ore, the contacting occurring at conditions effective to (1) chemically oxidize at least a portion of the carbonaceous material, and (2) at least partially liberate the first metal from the ore; and recovering the first metal from the ore.
    Type: Grant
    Filed: March 12, 1987
    Date of Patent: January 31, 1989
    Assignee: Ensci Incorporated
    Inventors: Thomas J. Clough, John W. Sibert, Arthur C. Riese
  • Metal value recovery
    Patent number: 4765827
    Abstract: A process for at least one of (1) recovering at least one first metal other than manganese from a first ore containing reducible manganese, and (2) recovering at least one second metal from a second ore containing the second metal and at least one metal sulfide of a metal other than the second metal and manganese; the process comprising at least one of: (A) contacting the first ore with an aqueous composition and a material containing at least one metal sulfide in the presence of a metal redox couple more positive than about +0.1 versus the standard hydrogen electrode, W. M.
    Type: Grant
    Filed: January 20, 1987
    Date of Patent: August 23, 1988
    Assignee: Ensci, Inc.
    Inventors: Thomas J. Clough, John W. Sibert, Arthur C. Riese