FR820254A
(en )
1937-11-09
Process for simultaneously obtaining krypton and nitrogen from air
FR748336A
(en )
1933-07-01
Process for the manufacture of highly concentrated nitrogen acid
FR764056A
(en )
1934-05-14
Manufacture of sulfuric acid by condensation
FR756593A
(en )
1933-12-12
Preparation of concentrated nitric acid
FR752042A
(en )
1933-09-15
Manufacture of nitrogen acid from nitrous gas
FR783867A
(en )
1935-07-19
Improvements in the manufacture of sulfuric acid
FR793754A
(en )
1936-01-31
Manufacture of highly concentrated nitric acid from dilute nitric acid
FR737168A
(en )
1932-12-08
Process for manufacturing oxygen enriched mixtures from air
FR772044A
(en )
1934-10-22
Process for manufacturing nitric acid from nitrous gas
FR760064A
(en )
1934-02-16
Improvements to the production of sulfur from gases containing sulfur dioxide
FR806854A
(en )
1936-12-28
Improvements in the manufacture of substituted malonic esters
FR747102A
(en )
1933-06-12
Improvement in the manufacture of nitric acid
FR805983A
(en )
1936-12-04
Improvement in the manufacture of compressed oxygen from air
FR761854A
(en )
1934-03-29
Improvements made to the manufacture of shielded cables, in particular to ignition cables
FR870511A
(en )
1942-03-13
Process for making the nitrogen oxides contained in the exhaust gases from installations for the production of sulfuric acid usable
FR748807A
(en )
1933-07-10
Improvements in the manufacture of hydrocarbons
FR748105A
(en )
1933-06-29
Further development in the manufacture of gas masks
FR41769E
(en )
1933-04-13
Improvements in the manufacture of fatty acid anhydrides
FR835552A
(en )
1938-12-26
Preparation of concentrated nitric acid starting from nitrous gas
FR750496A
(en )
1933-08-11
Improvements in the manufacture of aliphatic hydrocarbons
FR740912A
(en )
1933-02-03
Improvements in the manufacture of aliphatic acid anhydrides
FR875949A
(en )
1942-10-08
1-Amino-7-hydroxy-naphthalene-5-sulfonic acid, 1-amino-6-hydroxy-naphthalene-8-sulfonic acid, their nitrogen substitutes and methods of manufacture
FR751823A
(en )
1933-09-11
Improvements in the manufacture of aliphatic anhydrides
FR733081A
(en )
1932-09-30
Modification made to the manufacture of the toy
FR819182A
(en )
1937-10-12
Process for the preparation of stable colloidal sulfur from elemental sulfur and sulfur dioxide