CH318621A
(en )
1957-01-15
Process for the production of semiconductor structures and structures produced by this process
AT174929B
(en )
1953-05-26
Process for the production of pure iron and sulfuric acid from iron (II) sulfate heptahydrate
AT174069B
(en )
1953-02-25
Process for the production of technically pure iron
AT175910B
(en )
1953-08-25
Process for the electrolytic production of iron from iron (II) sulfate solutions
AT240875B
(en )
1965-06-25
Process for the production of sulfuric acid from iron sulfate
CH356442A
(en )
1961-08-31
Process for the production of finely divided silicon dioxide
AT181267B
(en )
1955-03-10
Process for the production of finely divided oxides
AT171733B
(en )
1952-06-25
Process for the production of folinic acid
AT172628B
(en )
1952-09-25
Process for the production of malleable cast iron
AT172359B
(en )
1952-09-10
Process for the production of folic acid
AT171924B
(en )
1952-07-25
Process for the production of surfaces for sports fields
AT174079B
(en )
1953-02-25
Process for the production of surfaces for sports fields
AT175884B
(en )
1953-08-25
Process for the separation of caprolactam from its solutions in sulfuric acid or oleum
AT176206B
(en )
1953-09-25
Process for the production of iron or copper oxide from iron or copper sulfate
CH347509A
(en )
1960-07-15
Process for the simultaneous production of sulfuric and nitric acid
AT178250B
(en )
1954-04-26
Process for the production of model pieces and device for carrying out the process
AT171910B
(en )
1952-07-25
Process for the production of steels in the basic Siemens Martin furnace
AT184504B
(en )
1956-01-25
Process for the production of pressure-resistant lightweight concrete and aerated concrete components
AT187214B
(en )
1956-10-25
Process for the production of conductor coils
AT200105B
(en )
1958-10-25
Process and device for the production of phosphoric acid
AT174619B
(en )
1953-04-25
Process for the production of technically pure iron by refining pig iron with oxygen
AT180065B
(en )
1954-11-10
Process for the production of potassium sulfate
AT170894B
(en )
1952-04-10
Process for the production of pure folic acid
AT175791B
(en )
1953-08-10
Process for the direct production of positives
AT187524B
(en )
1956-10-25
Process for the production of hydrogen cyanide