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Priority claimed from GB8722202Aexternal-prioritypatent/GB2210013A/en
Application filed by Grace W R & CofiledCriticalGrace W R & Co
Priority claimed from EP88308204Aexternal-prioritypatent/EP0309112B1/en
Application grantedgrantedCritical
Publication of ATE88961T1publicationCriticalpatent/ATE88961T1/en