Granted Patent
Utility
US 4,985,404 · App. 07/212,763
Prolonged release of biologically active polypeptides
Inventor:
James W. Mitchell
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Jun 29, 1988
Inventor
James W. Mitchell
Assignee (at issue)
Monsanto 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.