Granted Patent
Utility
US 4,743,649 · App. 06/902,718
Films of linear ethylene polymer and high impact polystyrene
Inventor:
David V. Dobreski
Patented Case
View Patent ↗
Granted: May 10, 1988
Filed: Sep 2, 1986
Inventor
David V. Dobreski
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.