Granted Patent
Utility
US 5,599,291 · App. 08/000,274
Softening expanding ureteral stent
Inventors:
Daniel J. Balbierz, Jack M. Walker, Joseph R. Thomas, Robert S. Bley
Patented Case
View Patent ↗
Granted: Feb 4, 1997
Filed: Jan 4, 1993
Inventors
Daniel J. Balbierz
Jack M. Walker
Joseph R. Thomas
Robert S. Bley
Assignee (at issue)
Menlo Care, 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.