Granted Patent
Utility
US 5,019,583 · App. 07/448,497
N-phenyl-N-(4-piperidinyl)amides useful as analgesics
Inventors:
Paul L. Feldman, Michael James, Marcus Brackeen, Michael R. Johnson, Harry J. Leighton
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Dec 11, 1989
Inventors
Paul L. Feldman
Michael James
Marcus Brackeen
Michael R. Johnson
Harry J. Leighton
Assignee (at issue)
Glaxo Group 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.