Assignee
DUVAL CORP
17 granted patents·373 citations·filing 1975–1985
Top patents by PatentIndex Score
17 records- 0195US4272341AProcess for recovery of metal values from lead-zinc ores, even those having a high carbonate contentDUVAL CORP·Filed 1980·Granted Jun 9, 1981·59 cites·42 claims
- 0290US4551213ARecovery of goldDUVAL CORP·Filed 1984·Granted Nov 5, 1985·68 cites·16 claims
- 0387US4342592ANon-polluting process for recovery of precious metal values from ores including those containing carbonate materialsDUVAL CORP·Filed 1980·Granted Aug 3, 1982·36 cites·15 claims
- 0482US4513859AConveyor with readily replaceable rollerDUVAL CORP·Filed 1982·Granted Apr 30, 1985·35 cites·9 claims
- 0580US4517064AElectrolytic cellDUVAL CORP·Filed 1983·Granted May 14, 1985·19 cites·6 claims
- 0680US4491279APortable rock crushing and conveying systemDUVAL CORP·Filed 1982·Granted Jan 1, 1985·30 cites·9 claims
- 0778US4025400AProcess and apparatus for the recovery of particulate crystalline product from an electrolysis systemDUVAL CORP·Filed 1975·Granted May 24, 1977·24 cites·27 claims
- 0874US4536214AMetal sulphide extractionDUVAL CORP·Filed 1983·Granted Aug 20, 1985·19 cites·23 claims
- 0962US4518418AElectron beam refinement of metals, particularly copperDUVAL CORP·Filed 1983·Granted May 21, 1985·11 cites·31 claims
- 1061US4147309AHydroset pressure relief systemDUVAL CORP·Filed 1977·Granted Apr 3, 1979·15 cites·10 claims
- 1155US3986943AHydrometallurgical process for the production of antimonyDUVAL CORP·Filed 1975·Granted Oct 19, 1976·9 cites·45 claims
- 1254US4544460ARemoval of potassium chloride as a complex salt in the hydrometallurgical production of copperDUVAL CORP·Filed 1981·Granted Oct 1, 1985·11 cites·11 claims
- 1349US4488902AHorizontal, multistage electron beam refinement of metals with recycleDUVAL CORP·Filed 1983·Granted Dec 18, 1984·7 cites·16 claims
- 1443US4634467AHydrometallurgical process for copper recoveryDUVAL CORP·Filed 1985·Granted Jan 6, 1987·8 cites·15 claims
- 1538US4045335ABeneficiation of kieserite and langbeinite from a langbeinite oreDUVAL CORP·Filed 1976·Granted Aug 30, 1977·9 cites·17 claims
- 1634US4475771ACyclic solution mining of borate oresDUVAL CORP·Filed 1983·Granted Oct 9, 1984·11 cites·22 claims
- 1729US4545972AProcess for recovery of metal chloride and cuprous chloride complex saltsDUVAL CORP·Filed 1982·Granted Oct 8, 1985·2 cites·10 claims
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