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
Application filed by Du PontfiledCriticalDu Pont
Priority to FI750981ApriorityCriticalpatent/FI61408C/fi
Publication of FI750981ApublicationCriticalpatent/FI750981A/fi
Application grantedgrantedCritical
Publication of FI61408BpublicationCriticalpatent/FI61408B/fi
Publication of FI61408CpublicationCriticalpatent/FI61408C/fi