Granted Patent
Utility
US 6,254,570 · App. 09/056,437
Back-up retention member drainage catheter
Inventors:
Alvin B. Rutner, Frederick D. Roemer
Patented Case
View Patent ↗
Granted: Jul 3, 2001
Filed: Apr 7, 1998
Inventors
Alvin B. Rutner
Frederick D. Roemer
Assignee (at issue)
Vance Products 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.