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Priority claimed from GB838332519Aexternal-prioritypatent/GB8332519D0/en
Priority claimed from GB848414437Aexternal-prioritypatent/GB8414437D0/en
Application filed by Ici PlcfiledCriticalIci Plc
Priority claimed from EP84307993Aexternal-prioritypatent/EP0145347B1/en
Application grantedgrantedCritical
Publication of ATE42417T1publicationCriticalpatent/ATE42417T1/en