Granted Patent
Utility
US 6,509,388 · App. 09/913,181
Polyurethane foams for use in wound dressings
Inventor:
Deborah Addison
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: Nov 15, 2001
Inventor
Deborah Addison
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.