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 IN810/DEL/81Aexternal-prioritypatent/IN157506B/en
Application filed by British Petroleum Co PlcfiledCriticalBritish Petroleum Co Plc
Priority to IN423/DEL/85ApriorityCriticalpatent/IN162859B/en
Publication of IN162859BpublicationCriticalpatent/IN162859B/en