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Duval Corporation

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  • Tucson, AZ, US
Organizations

Patents Grantslast 30 patents

  • Information Patent Grant

    Hydrometallurgical process for copper recovery
    • Patent number 4,634,467
    • Issue date Jan 6, 1987
    • Duval Corporation
    • Leonard R. Ochs
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Metal sulphide extraction
    • Patent number 4,536,214
    • Issue date Aug 20, 1985
    • Duval Corporation
    • Leonard R. Ochs
    • C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
  • Information Patent Grant

    Electrolytic cell
    • Patent number 4,517,064
    • Issue date May 14, 1985
    • Duval Corporation
    • Melvin S. Cook
    • C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
  • Information Patent Grant

    Cyclic solution mining of borate ores
    • Patent number 4,475,771
    • Issue date Oct 9, 1984
    • Duval Corporation
    • George E. Atwood
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Process and apparatus for the recovery of particulate crystalline p...
    • Patent number 4,025,400
    • Issue date May 24, 1977
    • Duval Corporation
    • Melvin S. Cook
    • C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR

Patents Applicationslast 30 patents

Trademarklast 30 trademarks