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 IN782/CAL/83Aexternal-prioritypatent/IN158680B/en
Priority claimed from FR8314294Aexternal-prioritypatent/FR2551429B2/fr
Application filed by Pechiney AluminiumfiledCriticalPechiney Aluminium
Priority to IN559/CAL/84ApriorityCriticalpatent/IN162157B/en
Publication of IN162157BpublicationCriticalpatent/IN162157B/en