Granted Patent
Utility
US 4,814,385 · App. 07/107,324
Films of blends of linear ethylene polymers and acrylonitrile polymers and copolymers
Inventors:
David V. Dobreski, Jack J. Donaldson
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Oct 9, 1987
Inventors
David V. Dobreski
Jack J. Donaldson
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.