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 IN449CA1990external-prioritypatent/IN172297B/en
Application filed by Lubrizol CorpfiledCriticalLubrizol Corp
Priority to IN928CA1991priorityCriticalpatent/IN173209B/en
Publication of IN173209BpublicationCriticalpatent/IN173209B/en