Granted Patent
Utility
US 4,303,710 · App. 06/126,932
Coextruded multi-layer polyethylene film and bag construction
Inventors:
Edward M. Bullard, Gregory M. Smith
Patented Case
View Patent ↗
Granted: Dec 1, 1981
Filed: Mar 3, 1980
Inventors
Edward M. Bullard
Gregory M. Smith
Assignee (at issue)
Mobil Oil 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.