Granted Patent
Utility
US 5,013,713 · App. 07/414,503
Prolonged release of biologically active somatotropin
Inventor:
James W. Mitchell
Patented Case
View Patent ↗
Granted: May 7, 1991
Filed: Sep 29, 1989
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.