Granted Patent
Utility
US 5,073,202 · App. 07/552,587
Method of using a biodegradable superabsorbing sponge
Inventor:
Donald F. H. Wallach
Patented Case
View Patent ↗
Granted: Dec 17, 1991
Filed: Jul 12, 1990
Inventor
Donald F. H. Wallach
Assignee (at issue)
Micro Vesicular Systems, Inc.
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.