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 Crown Zellerbach CorpfiledCriticalCrown Zellerbach Corp
Priority to BE612196ApriorityCriticalpatent/BE612196A/fr
Publication of BE612196ApublicationCriticalpatent/BE612196A/fr