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Priority claimed from US06/662,992external-prioritypatent/US4656325A/en
Application filed by Alcan Int LtdfiledCriticalAlcan Int Ltd
Priority claimed from EP85300915Aexternal-prioritypatent/EP0161739B1/de
Application grantedgrantedCritical
Publication of ATE48504T1publicationCriticalpatent/ATE48504T1/de