Granted Patent
Utility
US 4,604,397 · App. 06/771,934
Certain benzo-(pyrano and thiopyrano)-pyridines, useful as CNS agents
Inventor:
Alan Hutchison
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: Sep 3, 1985
Inventor
Alan Hutchison
Assignee (at issue)
Ciba-Geigy
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.