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US1778747A
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Tunnel kiln
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US1614707A
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Process of making adsorbent carbon
|
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US1774585A
|
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Process for the manufacture of adsorbent carbons
|
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US1677947A
|
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Revivifying of spent decolorizing materials
|
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US1502897A
|
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Apparatus for separating and recovering gases
|
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US1534488A
|
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Multiple-unit hearth furnace
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US1537286A
|
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Process for the manufacture of decolorizing carbons
|
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US1614913A
|
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Process for the manufacture of decolorizing carbons from vegetable materials
|
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US1502896A
|
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Process for the utilization of vegetable materials and manufacture of gas adsorbent and decolorizing carbons
|
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US1517526A
|
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Rapid-reaction furnace
|
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US1502895A
|
|
Apparatus for treating gases
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US1355642A
|
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Process for the manufacture of cyanids
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US1397613A
|
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Process of making cyanids
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