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Priority claimed from DE2431951Aexternal-prioritypatent/DE2431951A1/en
Priority claimed from DE2436012Aexternal-prioritypatent/DE2436012A1/en
Priority claimed from CS75753Aexternal-prioritypatent/CS187460B2/en
Application filed by Merck Patent GmbhfiledCriticalMerck Patent Gmbh
Priority to CS771754ApriorityCriticalpatent/CS187497B2/en
Publication of CS187497B2publicationCriticalpatent/CS187497B2/en