|
US1496440A
|
|
Electric furnace
|
|
US1451399A
|
|
Process of producing halogen acids
|
|
US1511646A
|
|
Process of making carbonyl halide
|
|
AU69416B
|
|
Improvements in or relating tothe treatment and breaking down of composite materials, such as metallic compounds ores andthe like
|
|
US1269236A
|
|
Process of purification.
|
|
US1296575A
|
|
Apparatus for carrying out processes of winning metals.
|
|
US1329315A
|
|
Electrolytic apparatus
|
|
US1506873A
|
|
Apparatus for producing and separating certain substances
|
|
US1241796A
|
|
Process of securing elements from their compounds.
|
|
US1297946A
|
|
Process for securing metals from their compounds.
|
|
US1300205A
|
|
Process of producing and separating certain substances.
|
|
US1238604A
|
|
Process of winning metals.
|
