Granted Patent
Utility
US 6,326,410 · App. 08/436,688
Wound dressing comprising polyurethane foam
Inventor:
Catherine L. Cheong
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: May 8, 1995
Inventor
Catherine L. Cheong
Assignee (at issue)
Johnson & Johnson Medical GMBH
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.