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Priority claimed from GB19327/76Aexternal-prioritypatent/GB1524747A/en
Application filed by Ici PlcfiledCriticalIci Plc
Priority to AT328184ApriorityCriticalpatent/AT379597B/de
Publication of ATA328184ApublicationCriticalpatent/ATA328184A/de
Application grantedgrantedCritical
Publication of AT379597BpublicationCriticalpatent/AT379597B/de