Granted Patent
Utility
US 5,223,346 · App. 07/781,448
HDPE/polypropylene film laminates
Inventor:
Pang-Chia Lu
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Oct 23, 1991
Inventor
Pang-Chia Lu
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.