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Priority claimed from US07/140,249external-prioritypatent/US4879362A/en
Priority claimed from US07/280,923external-prioritypatent/US4904726A/en
Application filed by Du PontfiledCriticalDu Pont
Priority claimed from EP19880121764external-prioritypatent/EP0322877B1/en
Application grantedgrantedCritical
Publication of ATE102224T1publicationCriticalpatent/ATE102224T1/en