CH138363A
(en )
1930-02-28
Process for roasting sulfur ores and other sulfur-containing materials.
AT140194B
(en )
1935-01-10
Process for dry chlorination of sulfidic ores.
SU27194A1
(en )
1932-07-31
The method of processing of sulfur ores
SU27193A1
(en )
1932-07-31
The method of processing of sulfur ores
AT127083B
(en )
1932-02-25
Method and device for reinforcing insoles.
DK46843C
(en )
1933-01-30
Process for the production of sulfur and oxides of iron from sulphide-containing iron ores.
FR607749A
(en )
1926-07-07
Sulfur ores roasting process
AT127012B
(en )
1932-02-25
Method and device for leaching clippings and. like
AT140833B
(en )
1935-02-25
Process for making crucibles and furnace stoves
CA288685A
(en )
1929-04-09
Ore concentration method
AT116353B
(en )
1930-02-25
Process for refining cellulose material.
AT127073B
(en )
1932-02-25
Process for separating materials with different physical properties.
CH144066A
(en )
1930-12-15
File and method of making the same.
ES95064A2
(en )
1926-01-16
Improvements in the desulfurization and concentration of sulfur iron ores.
ES92872A1
(en )
1925-06-01
Improvements in the desulfurization and concentration of sulfur iron ores.
AT126971B
(en )
1932-02-25
Process for drying peat and similar masses.
AT132083B
(en )
1933-02-25
Method and device for casting blank material.
AT121575B
(en )
1931-02-25
Apparatus for roasting coffee and the like like
CH153036A
(en )
1932-02-29
Process for the preparation of 1-m-oxyphenyl-2-methylamino-propan-1-ol.
AT132024B
(en )
1933-02-25
Process for the production of pure hydrogen sulfide gas or mixtures of hydrogen sulfide gas and sulfur dioxide from sulfur ores.
CH154163A
(en )
1932-04-30
Process for the production of hydrogen sulfide.
CH152812A
(en )
1932-02-29
Method and device for the production of cement.
CA293303A
(en )
1929-09-24
Ore enriching method
AT132013B
(en )
1933-02-25
Process for annealing and compacting zinc oxide or zinc white.
CH145390A
(en )
1931-02-28
Process and furnace system for the production of molten cement.