Patents by Inventor Gary A. Smyres

Gary A. Smyres 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 metal values from complex sulfides
    Patent number: 4410496
    Abstract: Metal values, such as copper, lead and zinc, are recovered from complex sulfides, e.g., ores or smelter flue dusts, by means of aqueous leaching in the presence of oxygen and CaCl.sub.2 or BaCl.sub.2 at elevated temperature.
    Type: Grant
    Filed: May 7, 1982
    Date of Patent: October 18, 1983
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Gary A. Smyres, Philip R. Haskett
  • Recovery of copper and silver from sulfide concentrates
    Patent number: 4053305
    Abstract: Copper and silver are recovered from complex sulfide ores or concentrates containing, in addition, metals such as lead, zinc, arsenic, antimony, and iron by leaching with a combination of ferrous chloride and oxygen.
    Type: Grant
    Filed: October 15, 1976
    Date of Patent: October 11, 1977
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Gary A. Smyres, Philip R. Haskett, Bernard J. Scheiner, Roald E. Lindstrom
  • Decomposition leach of sulfide ores with chlorine and oxygen
    Patent number: 3981962
    Abstract: Complex sulfide ores or concentrates are decomposed by treatment with a combination of chlorine and oxygen, the amount of chlorine being limited to that necessary to convert sulfides of the desired metals, such as zinc, lead, copper, cadmium, silver, nickel and cobalt to chlorides.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: September 21, 1976
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Gary A. Smyres, Philip R. Haskett, Bernard J. Scheiner, Roald E. Lindstrom