Granted Patent
Utility
US 5,019,650 · App. 07/398,999
4-aryl-4-piperidine (or pyrrolidine or hexahydroazepine) carbinols and heterocyclic analogs thereof
Inventors:
Engelbert Ciganek, Leonard Cook
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Aug 28, 1989
Inventors
Engelbert Ciganek
Leonard Cook
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.