Granted Patent
Utility
US 4,909,244 · App. 06/935,426
Hydrogel wound dressing
Inventors:
Alan J. Quarfoot, Patrick H. Hyla, Donald Patience
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Nov 26, 1986
Inventors
Alan J. Quarfoot
Patrick H. Hyla
Donald Patience
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.