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Priority claimed from GB888818857Aexternal-prioritypatent/GB8818857D0/en
Priority claimed from GB898906777Aexternal-prioritypatent/GB8906777D0/en
Application filed by Alcan Int LtdfiledCriticalAlcan Int Ltd
Priority claimed from EP89308023Aexternal-prioritypatent/EP0354752B1/en
Application grantedgrantedCritical
Publication of ATE95634T1publicationCriticalpatent/ATE95634T1/en