Granted Patent
Utility
US 4,644,038 · App. 06/781,841
Unsaturated poly (alpha-hydroxy acid) copolymers
Inventor:
Thomas F. Protzman
Patented Case
View Patent ↗
Granted: Feb 17, 1987
Filed: Sep 30, 1985
Inventor
Thomas F. Protzman
Assignee (at issue)
A.E. Staley Manufacturing 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.