Legal status (The legal status 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 status listed.)
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 GB812667Aexternal-prioritypatent/GB1156234A/en
Application filedfiledCritical
Application grantedgrantedCritical
Publication of FR1550764ApublicationCriticalpatent/FR1550764A/fr