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 Gres Cerame Et Produits SilicefiledCriticalGres Cerame Et Produits Silice
Priority to BE597754ApriorityCriticalpatent/BE597754A/fr
Publication of BE597754ApublicationCriticalpatent/BE597754A/fr