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 NL7210626Aexternal-prioritypatent/NL7210626A/xx
Priority claimed from IN2140/72Aexternal-prioritypatent/IN139192B/en
Application filed by StamicarbonfiledCriticalStamicarbon
Priority to IN1797/CAL/73ApriorityCriticalpatent/IN139194B/en
Publication of IN139194BpublicationCriticalpatent/IN139194B/en