Granted Patent
Utility
US 4,767,628 · App. 07/068,760
Continuous release pharmaceutical compositions
Inventor:
Francis G. Hutchinson
Patented Case
View Patent ↗
Granted: Aug 30, 1988
Filed: Jun 29, 1987
Inventor
Francis G. Hutchinson
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.