Granted Patent
Utility
US 5,804,213 · App. 07/914,751
Biologically active aqueous gel wound dressing
Inventor:
David Rolf
Patented Case
View Patent ↗
Granted: Sep 8, 1998
Filed: Jul 15, 1992
Inventor
David Rolf
Assignee (at issue)
LecTec Corporation
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.