Granted Patent
Utility
US 5,874,441 · App. 08/820,222
Carbocyclic and hetertocyclic fused-ring quinolinecarboxylic acids useful as immunosuppressive agents
Inventors:
Ronald L. Magolda, William J. Pitts, Irina C. Jacobson, Carl Henry Behrens, Michael J. Orwat, Douglas G. Batt
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Mar 18, 1997
Inventors
Ronald L. Magolda
William J. Pitts
Irina C. Jacobson
Carl Henry Behrens
Michael J. Orwat
Douglas G. Batt
Assignee (at issue)
Dupont Pharmaceuticals
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.