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
Application filed by Phillips Petroleum CofiledCriticalPhillips Petroleum Co
Priority to IN220CA1993priorityCriticalpatent/IN179021B/en
Priority to IN1068CA1997prioritypatent/IN183178B/en
Publication of IN179021BpublicationCriticalpatent/IN179021B/en