Granted Patent
Utility
US 4,517,187 · App. 06/435,132
1,3,4,6,7-11b-Hexahydro-7-phenyl-2H-pyrazino[2,1-a]isoquinolines methods of preparation, and use as antidepressants
Inventor:
Ronald C. Griffith
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: Oct 18, 1982
Inventor
Ronald C. Griffith
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.