|
US1285796A
|
|
Treatment of feldspar, leucite, and the like.
|
|
US1263705A
|
|
Method of obtaining alkalis and alumina from silicates containing them.
|
|
GB100637A
|
|
Process of and Apparatus for the Separation of Metalliferous Particles by Oil Flotation.
|
|
US1280283A
|
|
Process of roasting ores.
|
|
US1282847A
|
|
Zinc retort-furnace.
|
|
US1260944A
|
|
Method of obtaining alkalis from silicate-rock and other silicates.
|
|
US1495498A
|
|
Treatment of feldspar, leucite, and the like
|
|
US1061447A
|
|
Method of obtaining zinc oxid and sinter from alloys containing zinc.
|
|
US879483A
|
|
Metallurgical furnace.
|
|
US879482A
|
|
Metallurgy of ores of zinc, &c.
|
|
US958150A
|
|
Regenerative furnace.
|
