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US2526519A
|
|
Preparation of calcareous cement raw material
|
|
US2507014A
|
|
Combustion process
|
|
US2507013A
|
|
Froth flotation of calcite containing dolomite or magnesite
|
|
US2507012A
|
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Froth flotation beneficiating material containing dolomite or magnesite
|
|
US2571835A
|
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Separation of mineral mixtures
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US2349094A
|
|
Froth flotation
|
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US2255139A
|
|
Flotation of calcium carbonate ores
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US2214717A
|
|
Cement manufacture
|
|
US2214716A
|
|
Cement manufacture
|
|
US2214715A
|
|
Cement manufacture
|
|
US2202601A
|
|
Flotation reagent
|
|
US2216992A
|
|
Froth flotation reagent
|
|
US2130574A
|
|
Flotation of carbonaceous ores
|
|
US2161010A
|
|
Manufacture of cement
|
|
US2163702A
|
|
Flotation process
|
|
US2161011A
|
|
Manufacture of cement
|
|
US2144254A
|
|
Cement manufacture
|
|
US2162525A
|
|
Flotation of fine oxide ore minerals
|
|
US2163701A
|
|
Flotation process
|
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US2165268A
|
|
Flotation of oxide ore minerals
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