| Patents for C22B 47 - Obtaining manganese (857) |
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| 02/06/1979 | US4138465 Selective recovery of nickel, cobalt, manganese from sea nodules with sulfurous acid |
| 01/30/1979 | US4137291 Extraction of metal values from manganese nodules |
| 12/05/1978 | CA1043576A1 Two stage leaching of limonitic ore and sea nodules |
| 10/31/1978 | US4123499 Leaching, precipitation |
| 10/31/1978 | CA1041304A1 Process for recovering valuable metals from sulfate solutions |
| 10/24/1978 | CA1040868A1 Process for recovery of valuable metals from solution using neutralization by lime or limestone |
| 08/29/1978 | US4110106 Selective sulfation process for partitioning ferrous and non-ferrous values in an ore |
| 08/22/1978 | US4108638 Process for separating nickel, cobalt and copper |
| 08/22/1978 | CA1036829A1 Two stage sulfuric acid leaching of sea nodules |
| 08/15/1978 | US4107262 Cuprion process start-up control |
| 06/06/1978 | US4093698 Process for the simultaneous extraction of metal values from manganese nodules |
| 04/18/1978 | US4085188 Extracting nickel, cobalt, copper, and molybdenum values, precipitation of manganous carbonate |
| 04/11/1978 | US4083915 Reduction to divalent state, stripping with dilute acid |
| 01/17/1978 | US4069294 Hydrometallurgical recovery of metal values |
| 01/03/1978 | US4066733 Metal extraction from sea nodules |
| 12/27/1977 | US4065542 Two stage leaching of limonitic ore and sea nodules |
| 09/20/1977 | US4049438 Non-ferrous metal recovery from deep sea nodules |
| 09/06/1977 | US4046851 Two stage sulfuric acid leaching of sea nodules |
| 08/23/1977 | US4044094 Two-stage fluid bed reduction of manganese nodules |
| 08/23/1977 | US4043806 Alloys from manganese nodules |
| 08/16/1977 | US4042665 Cobalt ion exchange process |
| 08/16/1977 | US4042664 Method for separating metal constituents from ocean floor nodules |
| 07/26/1977 | US4038070 Low temperature and pressure continuous reduction of copper in acid solutions |
| 06/14/1977 | US4029733 Manganese |
| 06/14/1977 | US4029498 Process for treating manganese nodules |
| 06/07/1977 | US4028463 Recovery of manganese values |
| 05/31/1977 | US4026773 Extracting metal values from manganiferous ocean nodules |
| 04/26/1977 | US4020143 Use of raw manganese nodules for oxidation leaching of reductively roasted manganese nodules |
| 04/19/1977 | US4018866 Metal carbonate recycle to reduction circuit in the cuprion process |
| 04/05/1977 | US4016055 Containing copper, cobalt, iron and nickel; chlorination |
| 03/01/1977 | US4010236 Manganese ore reduction |
| 02/15/1977 | US4008104 Method for dephosphorization and denitrification of an alloy containing easily oxidizable components |
| 02/15/1977 | US4008076 Hydrometallurgy |
| 02/01/1977 | US4006215 Recovering iron, nickel, or cobalt from sulfate solution |
| 01/25/1977 | US4005173 Steam stripping of ammoniacal solutions and simultaneous loading of metal values by organic acids |
| 01/11/1977 | US4002717 Refining of manganese oxide ores |
| 11/30/1976 | US3994720 Gas treatment with alkanol or alkanal |
| 11/16/1976 | US3992507 Halidation of manganiferous ore to obtain metal values and recovery and recycle of halide values |
| 11/16/1976 | US3992193 Metal oxides, quenching |
| 11/09/1976 | US3990891 Aluminum halides |
| 10/26/1976 | US3988416 Elevated pressure operation in the cuprion process |
| 10/26/1976 | US3988224 Method of extraction of metallic elements from submarine nodules |
| 10/19/1976 | US3986866 Method of recovery of metal compounds and metals from nitrate solutions |
| 10/12/1976 | US3985556 With carbon monoxide |
| 10/05/1976 | US3984520 Ion exchanging |
| 10/05/1976 | US3984232 Reduction of manganiferous oxide minerals |
| 09/28/1976 | US3983017 Recovery of metal values from manganese deep sea nodules using ammoniacal cuprous leach solutions |
| 08/24/1976 | US3976472 Method and an electrically heated device for producing molten metal from powders or lumps of metal oxides |
| 05/18/1976 | US3957485 Reduction smelting of manganese nodules with a liquid reductant |
| 04/20/1976 | US3951647 From manganese halide and aluminum |
| 04/13/1976 | US3950487 Solvent-in-pulp extraction of copper and nickel from ammoniacal leach slurries |
| 04/13/1976 | US3950486 Method for separating metal constituents from ocean floor nodules |
| 04/13/1976 | US3950162 Reduction to manganese metal using metal transporting compounds |
| 03/09/1976 | US3942974 Manganese nodule pelletizing |
| 02/24/1976 | US3940470 Direct recovery of metals from fluid anhydrous metal halides derived from marine nodule halidation |
| 01/20/1976 | US3932945 Direct cooling of reduced manganese ore |
| 01/06/1976 | US3930974 Two stage selective leaching of metal values from ocean floor nodule ore |