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Priority claimed from GB888807444Aexternal-prioritypatent/GB8807444D0/en
Priority claimed from GB888815219Aexternal-prioritypatent/GB8815219D0/en
Application filed by Allied Colloids LtdfiledCriticalAllied Colloids Ltd
Priority claimed from EP89302842Aexternal-prioritypatent/EP0335575B2/de
Application grantedgrantedCritical
Publication of ATE86693T1publicationCriticalpatent/ATE86693T1/de