Granted Patent
Utility
US 4,889,862 · App. 07/060,203
Freeze-dried pharmaceutical compositions of phenylquinoline carboxylic acids
Inventor:
Chien-Chin Wu
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Jun 10, 1987
Inventor
Chien-Chin Wu
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.