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 IN864/CAL/88Aexternal-prioritypatent/IN171002B/en
Application filed by Pennwalt CorpfiledCriticalPennwalt Corp
Priority to IN365/CAL/91ApriorityCriticalpatent/IN171619B/en
Publication of IN171619BpublicationCriticalpatent/IN171619B/en