Granted Patent
Utility
US 4,638,045 · App. 06/703,153
Non-peptide polyamino acid bioerodible polymers
Inventors:
Joachim B. Kohn, Robert S. Langer
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Feb 19, 1985
Inventors
Joachim B. Kohn
Robert S. Langer
Assignee (at issue)
MASSACHUSETTS INSTITUTE OF TECHNOLOGY
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.