Patents by Inventor Philip R. Haskett

Philip R. Haskett 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
  • Recovering copper values from oxidized ores
    Patent number: 3985855
    Abstract: A process for recovering copper from oxidized ores by utilizing alkaline leachants having incorporated therein siliceous material to inhibit the dehydration of the formed copper complex, thereby permitting increased recovery and improved settling and filtering characteristics of the reacted slurry.
    Type: Grant
    Filed: May 9, 1975
    Date of Patent: October 12, 1976
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Philip R. Haskett, Donald J. Bauer, Carl H. Elges, III, 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
  • Hydrometallurgical process for copper recovery from sulfide ores
    Patent number: 3961942
    Abstract: Recovery of copper from sulfide ores is achieved by placing the ore together with a caustic soda or potash solution in a pressure vessel. An oxidizing gas is then introduced into the vessel and the temperature and pressure of the system is adjusted as required. Copper ions are freed from the crystalline structure in the form of the complex anion, Cu(OH).sub.4 .sup.=. The copper may then be recovered by reduction or precipitation as cupric oxide.
    Type: Grant
    Filed: March 19, 1975
    Date of Patent: June 8, 1976
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Philip R. Haskett, Carl H. Elges, III, Donald J. Bauer, Roald E. Lindstrom