Granted Patent
Utility
US 5,574,159 · App. 08/430,677
Opioid compounds and methods for making therefor
Inventors:
Kwen-Jen Chang, Dulce Garrido Bubacz, Ann O. Davis, Robert W. McNutt, Jr., Michael J. Bishop
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Apr 28, 1995
Inventors
Kwen-Jen Chang
Dulce Garrido Bubacz
Ann O. Davis
Robert W. McNutt, Jr.
Michael J. Bishop
Assignee (at issue)
Delta Pharmaceuticals Ltd.
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.