Granted Patent
Utility
US 5,234,456 · App. 07/883,241
Hydrophilic stent
Inventor:
Thomas A. Silvestrini
Patented Case
View Patent ↗
Granted: Aug 10, 1993
Filed: May 7, 1992
Inventor
Thomas A. Silvestrini
Assignee (at issue)
Pfizer Hospital Products Group, 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.