FR540585A
(en )
1922-07-13
Hydrocarbon treatment process
FR521891A
(en )
1921-07-21
Process for the preparation of pyridic bases
CH78236A
(en )
1918-12-16
Process for the treatment of peat
FR490061A
(en )
1919-04-01
Wringer for the treatment of mineral materials
FR515075A
(en )
1921-03-24
Process for the treatment of ash by fusion
FR489879A
(en )
1919-03-19
Process for the purification of natural graphites
CH81076A
(en )
1919-05-01
Apparatus for treating peat
CH77934A
(en )
1918-06-17
Process for the treatment of tanned skin
FR488958A
(en )
1918-12-03
Process for the treatment of copper waste
FR532666A
(en )
1922-02-09
Process for the etherification of organic acids
FR22364E
(en )
1921-07-01
Wringer for the treatment of mineral materials
FR488645A
(en )
1918-10-23
Process for the treatment of ores
FR491062A
(en )
1919-05-20
Electrochemical process for the regeneration of files
FR533176A
(en )
1922-02-23
Process for the manufacture of cokemetallurgical
FR487147A
(en )
1918-06-05
Process for the treatment of iron ores
FR488359A
(en )
1918-09-17
Enfleurage process
FR432787A
(en )
1911-12-15
Process for the treatment of oilseeds
FR540004A
(en )
1922-07-04
Briquette and process for making it
CH78646A
(en )
1918-08-16
Process for the manufacture of briquettes
FR516629A
(en )
1921-04-23
Process for the manufacture of perborates
FR445542A
(en )
1912-11-13
Process for the treatment of calcium cyanamide
FR516904A
(en )
1921-04-28
Process for the preparation of alkaline percarbonates
FR519513A
(en )
1921-06-11
Process for the production of petroleum jelly
FR500659A
(en )
1920-03-20
Process for the regeneration of substances known as: decolorizing carbon
FR487241A
(en )
1918-06-18
Process and installation for the treatment of oils