Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from FI2928/70Aexternal-prioritypatent/FI53794C/fi
Application filed by Ici LtdfiledCriticalIci Ltd
Publication of FI780393ApublicationCriticalpatent/FI780393A/fi
Publication of FI55141BpublicationCriticalpatent/FI55141B/fi
Application grantedgrantedCritical
Publication of FI55141CpublicationCriticalpatent/FI55141C/fi