Granted Patent
Utility
US 5,216,018 · App. 07/836,229
Hydroisoindolines and hydroisoquinolines as psychotropic
Inventor:
Engelbert Ciganek
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Feb 14, 1992
Inventor
Engelbert Ciganek
Assignee (at issue)
The DuPont Merck Pharmaceutical 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.