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Priority claimed from DE3218075Aexternal-prioritypatent/DE3218075A1/de
Application filed by Spumalit AnstaltfiledCriticalSpumalit Anstalt
Priority claimed from EP83104202Aexternal-prioritypatent/EP0094530B1/de
Application grantedgrantedCritical
Publication of ATE20717T1publicationCriticalpatent/ATE20717T1/de