Granted Patent
Utility
US 4,645,490 · App. 06/683,056
Nephrostomy catheter with formed tip
Inventor:
Helmut W. G. Rosenberg
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Dec 18, 1984
Inventor
Helmut W. G. Rosenberg
Assignee (at issue)
The Kendall Company LP
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.