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Priority claimed from DE3544563Aexternal-prioritypatent/DE3544563C2/en
Priority claimed from DE19853544562external-prioritypatent/DE3544562C2/en
Application filed by Sueddeutsche Kalkstickstoff, Thyssen Stahl AgfiledCriticalSueddeutsche Kalkstickstoff
Priority claimed from EP86117417Aexternal-prioritypatent/EP0226994B1/en
Application grantedgrantedCritical
Publication of ATE54673T1publicationCriticalpatent/ATE54673T1/en