Granted Patent
Utility
US 4,726,984 · App. 06/750,705
Oxygen barrier oriented film
Inventor:
Gautam P. Shah
Patented Case
View Patent ↗
Granted: Feb 23, 1988
Filed: Jun 28, 1985
Inventor
Gautam P. Shah
Assignee (at issue)
W. R. Grace & Co.
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.