Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Univ Dev FoundationfiledCriticalUniv Dev Foundation
Application grantedgrantedCritical
Publication of FI49192BpublicationCriticalpatent/FI49192B/fi
Publication of FI49192CpublicationCriticalpatent/FI49192C/sv
D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
D21C3/00—Pulping cellulose-containing materials
D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
FI5269A1968-01-091969-01-09Förfarande för framställning av pappersmassa.
FI49192C
(sv)