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 Chemical Construction CorpfiledCriticalChemical Construction Corp
Priority to DK421553ApriorityCriticalpatent/DK87443C/en
Application grantedgrantedCritical
Publication of DK87443CpublicationCriticalpatent/DK87443C/en