Granted Patent
Utility
US 5,985,880 · App. 08/887,312
Compositions and methods for reducing respiratory depression and attendant side effects of mu opioid compounds
Inventors:
Kwen-Jen Chang, Robert W. McNutt, Jr., Hugh O. Pettit, Michael J. Bishop
Patented Case
View Patent ↗
Granted: Nov 16, 1999
Filed: Jul 3, 1997
Inventors
Kwen-Jen Chang
Robert W. McNutt, Jr.
Hugh O. Pettit
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.