Granted Patent
Utility
US 5,972,443 · App. 08/693,189
Multilayer ethylene copolymer film
Inventors:
Alan Keith Breck, Alana Joi Verdone
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Sep 19, 1996
Inventors
Alan Keith Breck
Alana Joi Verdone
Assignee (at issue)
DuPont Canada 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.