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Priority claimed from DE19873717471external-prioritypatent/DE3717471A1/en
Priority claimed from DE19873717470external-prioritypatent/DE3717470A1/en
Priority claimed from DE19873717468external-prioritypatent/DE3717468A1/en
Application filed by Huels Gaf Chemie GmbhfiledCriticalHuels Gaf Chemie Gmbh
Priority claimed from EP88105336Aexternal-prioritypatent/EP0292674B1/en
Application grantedgrantedCritical
Publication of ATE82243T1publicationCriticalpatent/ATE82243T1/en