Granted Patent
Utility
US 4,727,152 · App. 06/835,836
Intermediates useful in the preparation of fused aromatic oxazepinones, thiazepinones, diazepinones and sulfur analogs thereof
Inventor:
Albert D. Cale, Jr.
Patented Case
View Patent ↗
Granted: Feb 23, 1988
Filed: Mar 3, 1986
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.