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Priority claimed from CA000430111Aexternal-prioritypatent/CA1181224A/en
Priority claimed from CA000431677Aexternal-prioritypatent/CA1181225A/en
Application filed by Tenneco Canada IncfiledCriticalTenneco Canada Inc
Priority claimed from EP19840303834external-prioritypatent/EP0131378B2/de
Application grantedgrantedCritical
Publication of ATE42944T1publicationCriticalpatent/ATE42944T1/de