Granted Patent
Utility
US 4,772,705 · App. 06/759,022
Processes for the preparation of trans 1,3,4,6,7,11b-hexahydro-7-aryl-2H-pyrazinol[2,1-a]isoquinolines
Inventor:
Richard Schmiesing
Patented Case
View Patent ↗
Granted: Sep 20, 1988
Filed: Jul 25, 1985
Inventor
Richard Schmiesing
Assignee (at issue)
Pennwalt Corporation
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.