Granted Patent
Utility
US 4,668,685 · App. 06/733,464
Substituted benzoate ester prodrug derivatives of 3-hydroxymorphinans, which are analgesics or narcotic antagonists
Inventor:
Elie G. Shami
Patented Case
View Patent ↗
Granted: May 26, 1987
Filed: May 14, 1985
Inventor
Elie G. Shami
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.