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Priority claimed from US06/921,937external-prioritypatent/US4816061A/en
Application filed by Dow Chemical CofiledCriticalDow Chemical Co
Priority claimed from EP19870202027external-prioritypatent/EP0266828B1/de
Application grantedgrantedCritical
Publication of ATE74706T1publicationCriticalpatent/ATE74706T1/de