US2094277A
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Method of sulphating the ore metal values of a sulphide ore
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US2144299A
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Method of making zinc carbonate and zinc oxide
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US2121887A
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Method of sulphating an ore material
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Method of making lead compounds
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US2067778A
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Method of treating complex lead bearing ore materials
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US2094276A
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Method of making lead oxide
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US2068690A
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Method of recovering compounds from zinc and lead ores
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US2134528A
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Treatment of lead bearing cres and the preparation of compounds therefrom
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US2091797A
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Method of making white lead pigment
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US2085114A
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Method of treating an ore material
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US2039331A
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Method of treating a zinc bearing ore material
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US2094275A
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Method of treating an ore material
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US2070213A
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Method of making white lead pigment
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GB445861A
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Improvements in and relating to the treatment of ores
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US2082032A
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White lead pigment and method of making the same
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US2045092A
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Method of chloridizing ore materials
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US2055613A
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Method of chloridizing ore materials
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US2054226A
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Method of treating lead sulphide ores
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US2051962A
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Apparatus for treating granular material with a reagent gas
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US2015687A
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Ore treatment apparatus
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