Granted Patent
Utility
US 4,289,830 · App. 06/130,229
Ethylene-vinyl alcohol copolymer gas barrier layer with phenol additive
Inventor:
Jack E. Knott, II
Patented Case
View Patent ↗
Granted: Sep 15, 1981
Filed: Mar 14, 1980
Inventor
Jack E. Knott, II
Assignee (at issue)
American Can Company
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.