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 US07/200,815external-prioritypatent/US4915890A/en
Application filed by Dow Chemical CofiledCriticalDow Chemical Co
Application grantedgrantedCritical
Publication of ATE99654T1publicationCriticalpatent/ATE99654T1/de