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 CH4268/88Aexternal-prioritypatent/CH674234A5/de
Application filed by Sap Baustoffe & Bauchemie AgfiledCriticalSap Baustoffe & Bauchemie Ag
Application grantedgrantedCritical
Publication of ATE74987T1publicationCriticalpatent/ATE74987T1/de