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Priority claimed from DE1961B0063452external-prioritypatent/DE1141614B/de
Priority claimed from DEB63469Aexternal-prioritypatent/DE1145136B/de
Application filed by Basf AgfiledCriticalBasf Ag
Application grantedgrantedCritical
Publication of BE618627RpublicationCriticalpatent/BE618627R/fr