CH63755A
(en )
1914-02-16
Process for extracting zinc from blende
FR445208A
(en )
1912-11-06
Process for making metals ductile
FR463599A
(en )
1914-02-26
Process for the electroplating of metals from solutions
FR17653E
(en )
1913-10-27
Process for making metals ductile
FR16435E
(en )
1913-01-31
Process for making metals ductile
FR458149A
(en )
1913-10-03
Process for the extraction of metallic zinc from its ores
FR462580A
(en )
1914-01-30
Metal sulphide separation process
FR432269A
(en )
1911-12-02
Process for removing zinc from lead
FR494514A
(en )
1919-09-11
Process for extracting zinc from its ores
FR413170A
(en )
1910-08-02
Process for ore reduction
CH63753A
(en )
1914-02-16
Process for extracting tin from cassiterite
FR494518A
(en )
1919-09-11
Process for recovering zinc from ores containing it
FR411614A
(en )
1910-06-21
Process for the production of zinc boron-diorthooxybenzoate
FR463598A
(en )
1914-02-26
Electrolytic process for the extraction of copper from ores
FR476218A
(en )
1915-07-20
Advanced process for extracting metals from ores
FR447218A
(en )
1912-12-27
Process for reducing metalliferous substances
FR494516A
(en )
1919-09-11
Process for recovering zinc from its solutions
FR458028A
(en )
1913-10-01
Process for the extraction of sulfur from pyrites
FR447085A
(en )
1912-12-21
Hydrocarbon solidification process
FR465561A
(en )
1914-04-20
Metal coating process for propellers
FR433695A
(en )
1912-01-13
Advanced process for the manufacture of metallurgical coke
FR456783A
(en )
1913-09-04
Metal refining process
FR19476E
(en )
1915-02-11
Process for degreasing the skins
CH60327A
(en )
1913-07-01
Process for detaning leather
FR460570A
(en )
1913-12-05
Process for working metals