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US2766888A
|
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Method and apparatus for magnetic separation of ores
|
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US2772777A
|
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Apparatus for magnetic separation of ores
|
|
US2756136A
|
|
Method of chloridizing sintering of zinciferous materials with elimination of lead and similar contaminants
|
|
US2664200A
|
|
Apparatus for electromagnetic separation of wet ores
|
|
US2461697A
|
|
Recovery of zinc from its ores
|
|
US2478594A
|
|
Method of condensing zinc
|
|
US2482933A
|
|
Glass impregnated carbon articles
|
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US1602834A
|
|
Charging machine
|
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US1082765A
|
|
Condensation of zinc.
|
|
US865727A
|
|
Method of making and utilizing gas.
|
|
US813021A
|
|
Method of charging retorts, muffles, furnaces, and the like.
|
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US813022A
|
|
Charging-machine.
|
|
US813023A
|
|
Apparatus for charging retort-benches.
|
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US792452A
|
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Manufacture of crucibles.
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