Granted Patent
Utility
US 4,254,024 · App. 06/085,253
Tetrapeptides and derivatives having opiate activity
Inventors:
John M. Stewart, Dan H. Morris, Richard E. Chipkin
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Oct 16, 1979
Inventors
John M. Stewart
Dan H. Morris
Richard E. Chipkin
Assignee (at issue)
Pennwalt Corporation
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.