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 IN293DE1988external-prioritypatent/IN172404B/en
Application filed by Lubrizol CorpfiledCriticalLubrizol Corp
Priority to IN271DE1991priorityCriticalpatent/IN183933B/en
Publication of IN183933BpublicationCriticalpatent/IN183933B/en