Granted Patent
Utility
US 4,804,564 · App. 07/086,221
Plastic bags of blends of linear ethylene polymers and aromatic polymers
Inventors:
David V. Dobreski, Bruce E. Nattinger
Patented Case
View Patent ↗
Granted: Feb 14, 1989
Filed: Aug 13, 1987
Inventors
David V. Dobreski
Bruce E. Nattinger
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.