COMPAGNIE FRANCAISE D'ENTREPRISES MINIERES, METALLURGIQUES ET D' INVESTISSEMENTS

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4314900 Method for producing distillable hydrocarbonaceous fuels and carbonaceous agglomerates from a heavy crude oilExpiredMay 07, 80Feb 09, 82[C10G]
4243498 Nickel electrowinning using reduced nickel oxide as a fluidized cathodeExpiredFeb 16, 79Jan 06, 81[C25C]
4240886 Electrowinning using fluidized bed apparatusExpiredFeb 16, 79Dec 23, 80[C25C]
4241031 Dissolution of nickeliferous sulfide material in HClExpiredFeb 16, 79Dec 23, 80[C01G]
4233273 Selective extraction of iron and aluminum from acidic solutionsExpiredFeb 16, 79Nov 11, 80[C01G, C01F]
4221765 Purification of nickel chloride solutionsExpiredFeb 16, 79Sep 09, 80[C01G]
4214901 Hydrometallurgical refining of nickeliferous sulfidesExpiredFeb 16, 79Jul 29, 80[C22B]
4195065 Leaching nickeliferous oxide oresExpiredNov 06, 78Mar 25, 80[C01G]
4193969 Selective nickel and cobalt extraction from aqueous acidic solutionsExpiredNov 12, 76Mar 18, 80[C01G]

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