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Priority claimed from US05/653,188external-prioritypatent/US4035229A/en
Priority claimed from AT49477Aexternal-prioritypatent/AT359824B/de
Application filed by Hercules IncfiledCriticalHercules Inc
Priority to AT352479ApriorityCriticalpatent/AT359371B/de
Publication of ATA352479ApublicationCriticalpatent/ATA352479A/de
Application grantedgrantedCritical
Publication of AT359371BpublicationCriticalpatent/AT359371B/de