Granted Patent
Utility
US 4,838,876 · App. 07/157,171
Silicone rubber catheter having improved surface morphology
Inventors:
Edward W. Wong, Daniel Ballan
Patented Case
View Patent ↗
Granted: Jun 13, 1989
Filed: Feb 11, 1988
Inventors
Edward W. Wong
Daniel Ballan
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.