Granted Patent
Utility
US 5,648,141 · App. 08/501,360
Debridement sponge
Inventors:
David E. Butterworth, John Dyer, John W. Kennette
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Jul 12, 1995
Inventors
David E. Butterworth
John Dyer
John W. Kennette
Assignee (at issue)
Chicopee
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.