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Priority claimed from FR8310721Aexternal-prioritypatent/FR2548085B1/fr
Priority claimed from FR8408123Aexternal-prioritypatent/FR2564775B1/fr
Application filed by Charbonnages Ste ChimiquefiledCriticalCharbonnages Ste Chimique
Priority claimed from EP84401374Aexternal-prioritypatent/EP0130909B1/de
Application grantedgrantedCritical
Publication of ATE32991T1publicationCriticalpatent/ATE32991T1/de