US2648637A
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Method of producing activated carbon
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GB493058A
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Improvements relating to the carburizing of iron, steel and alloy steels
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US2149747A
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Carburizer
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US2107765A
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Water treatment
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US1933567A
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Process for purifying water
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US1818431A
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Quenching oils
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US1535379A
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Quenching oil
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US1372832A
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Case-hardening compound and method of manufacturing
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US1433039A
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Method of making finely-divided carbonaceous char
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US1591235A
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Method of making activated carbon
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US1474120A
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Decolorizing material and process of making same
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US1420754A
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Carbonaceous product and the method of making same
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US1292652A
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Method of carburizing.
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US1283310A
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Method of making low-density coked products.
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US1270875A
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Food product and method of making the same.
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US1334405A
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Method of utilizing fuel
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US1209336A
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Process of manufacturing carburizing material and oil distillates.
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US1270874A
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Case-hardening material.
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US1279160A
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Carburizing material.
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US1076235A
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Case-hardening material.
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