CH16760A
(en )
1899-02-15
Apparatus for extracting gold from ores by amalgamation
FR735E
(en )
1903-03-04
Process for extracting metals from their ores
FR334272A
(en )
1903-12-17
Process for extracting metals from complex ores
FR344301A
(en )
1904-10-31
Process for extracting gold from gold ores
FR345063A
(en )
1904-11-21
Apparatus for extracting arsenious acid from ores
GB189515356A
(en )
1896-09-15
Improvements in Apparatus for Extracting Gold by Means of Mercury.
FR356825A
(en )
1905-12-09
Method and device for extracting metals from ores and other metalliferous materials, by dissolution and electrolysis
FR350668A
(en )
1905-06-22
Process and apparatus for extracting gold from waters containing this metal
FR326325A
(en )
1903-05-21
Improved process and apparatus for extracting copper from its ore
GB189516920A
(en )
1895-12-21
Improved Process and Apparatus for Extracting Gold from Ores and other Auriferous Substances.
FR5106E
(en )
1905-12-11
Method and device for extracting metals from ores and other metalliferous materials, by dissolution and electrolysis
FR456380A
(en )
1913-08-25
Method and apparatus for extracting tin from its ores and tin dross
CH19785A
(en )
1900-09-30
Apparatus for the treatment of gold and other ores by amalgamation
FR5738E
(en )
1906-08-08
Process for extracting copper from its ores
FR466072A
(en )
1914-05-04
Method and apparatus suitable for extracting, separating and recovering precious metals from their ores
FR401443A
(en )
1909-08-28
Process for extracting metals from ores
GB189518177A
(en )
1896-01-04
Process and Apparatus for the Extraction of Gold and Silver from their Ores, and from other Auriferous and Argentiferous Substances.
FR405030A
(en )
1909-12-17
Process for extracting metals from their ores
FR348804A
(en )
1905-04-27
Improvements in processes for extracting metals from their ores and other materials
FR417208A
(en )
1910-11-09
Improvements in the method of extracting metals from their ores
FR325895A
(en )
1903-05-11
Process for extracting zinc and other volatile metals from their ores
GB189611839A
(en )
1897-05-29
Improved Method and Machinery or Apparatus for Extracting Gold from Crushed Ore or Material Containing it.
FR388503A
(en )
1908-08-14
Process for extracting zinc and other volatile metals from ores and metallurgical products
FR419938A
(en )
1911-01-18
Method and apparatus for dissolving and extracting precious metals from refractory ores
FR440519A
(en )
1912-07-12
Method and apparatus for extracting gold, silver and other metals from sea water