Granted Patent
Utility
US 4,537,963 · App. 06/522,094
Intermediates for octahydrobenzofuro[3,2-E]isoquinolines
Inventor:
Ashokkumar B. Shenvi
Patented Case
View Patent ↗
Granted: Aug 27, 1985
Filed: Aug 11, 1983
Inventor
Ashokkumar B. Shenvi
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.