Granted Patent
Utility
US 4,719,039 · App. 06/857,301
Electrically conductive polyethylene foam
Inventor:
Nicholas J. Leonardi
Patented Case
View Patent ↗
Granted: Jan 12, 1988
Filed: Apr 30, 1986
Inventor
Nicholas J. Leonardi
Assignee (at issue)
Dynamit Nobel of America, 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.