Granted Patent
Utility
US 4,746,657 · App. 07/072,649
Fused aromatic tetrahydroazepinones (and thiones)
Inventor:
Albert D. Cale, Jr.
Patented Case
View Patent ↗
Granted: May 24, 1988
Filed: Jul 13, 1987
Inventor
Albert D. Cale, Jr.
Assignee (at issue)
A. H. Robins Company, Incorporated
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.