Granted Patent
Utility
US 5,602,227 · App. 08/522,427
Biodegradable copolymers
Inventor:
Isao Noda
Patented Case
View Patent ↗
Granted: Feb 11, 1997
Filed: Aug 30, 1995
Inventor
Isao Noda
Assignee (at issue)
The Procter & Gamble 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.