FR476751A
(en )
1915-08-31
Pure zinc oxide manufacturing process
CH61210A
(en )
1913-09-16
Zinc oxide manufacturing process
FR465816A
(en )
1914-04-28
Manufacturing process of pure zinc oxide or pure metallic zinc
FR428657A
(en )
1911-09-05
Process for the production of pure nitrogen oxide
FR475476A
(en )
1915-05-18
Pure alumina manufacturing process
FR443048A
(en )
1912-09-14
Process for the production of pure zinc oxide by direct extraction of ores or of any zinc salts
FR437889A
(en )
1912-05-02
Process for the production of pure zinc oxide by direct extraction of ores or of any zinc salts
FR513046A
(en )
1921-02-05
Zinc oxide manufacturing process
FR508944A
(en )
1920-10-27
Manufacturing process of zinc sulphide, applicable to the production of zinc oxide
FR461905A
(en )
1914-01-14
Process for the production of pure zinc
FR459318A
(en )
1913-11-03
Hydrosulphite electrolytic manufacturing process
FR441565A
(en )
1912-08-10
Process for the manufacture of barium oxide with barium carbonate
FR441352A
(en )
1912-08-05
Advanced steelmaking process
FR460837A
(en )
1913-12-12
Ammonia soda manufacturing process
FR431117A
(en )
1911-11-03
Zinc oxide extraction process
FR494517A
(en )
1919-09-11
Zinciferous solutions purification process
FR470321A
(en )
1914-09-05
Process for obtaining pure zinc oxide in a closed cycle
FR18022E
(en )
1914-01-15
Azide manufacturing process
FR523351A
(en )
1921-08-17
Fertilizer manufacturing process
CH67350A
(en )
1914-12-01
Isoprene manufacturing process
FR446593A
(en )
1912-12-09
Process for the manufacture of celluloid buttons
FR460857A
(en )
1913-12-13
Process for the manufacture of tin oxides
FR403681A
(en )
1909-11-11
Zinc oxide production process
FR449323A
(en )
1913-02-24
Fine steel manufacturing process
FR478167A
(en )
1915-11-26
Process for the production of chemically pure hydrogen peroxide solutions