GB109817A
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Improvements in or relating to the Extraction of Lead from its Ores or Lead-containing Materials.
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GB191227626A
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Improvements in or relating to the Recovery of Nickel from its Ores.
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GB191223591A
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Improvements in or relating to the Extraction of Nitrates.
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GB191008650A
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Improvements in the Selective Separation of Metals from Complex Ores of Products.
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GB190928933A
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Improvements in or relating to the Concentration of Ores.
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GB190926019A
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Improvements in the Concentration of Oxidised Ores.
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US962678A
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Ore concentration.
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GB190901882A
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Improvements in and relating to the Treatment of Metalliferous Ores or Compounds by Wet Processes.
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GB190828173A
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Improvements in or relating to the Concentration of Ores.
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GB190807230A
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Improvements in or relating to the Application of Metallic Coatings to Articles of Glazed China, Porcelain or Earthenware.
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GB190800701A
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Improvements in the Separation of Zinc from its Ores or Compounds.
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GB190702058A
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Improvements in or relating to the Separation of Zinc from its Sulphates.
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US875866A
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Process of obtaining zinc oxid from zinc ores.
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GB190622534A
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Improvements in the Separation of Zinc from its Ores or Compounds.
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GB190621672A
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Improvements in the Separation of Zinc from its Ores or Compounds
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GB190619944A
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Improvements in or relating to Ore Concentration
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GB190609981A
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Improvements in or relating to Ore Concentration and Apparatus therefor.
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GB190526711A
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Improvements in or relating to the Separation of Minerals.
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GB190526712A
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Improvements in or relating to Ore Concentration.
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US835143A
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Ore concentration.
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