Granted Patent
Utility
US 6,086,558 · App. 09/222,474
Balloon catheter for photodynamic therapy
Inventors:
Robert David Bower, Michael David Leslie Stonefield, Joseph Yan
Patented Case
View Patent ↗
Granted: Jul 11, 2000
Filed: Dec 29, 1998
Inventors
Robert David Bower
Michael David Leslie Stonefield
Joseph Yan
Assignee (at issue)
QLT PhotoTherapeutices 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.