Granted Patent
Utility
US 4,461,792 · App. 06/428,996
Poly-1-butene multilayers plastic film
Inventor:
John Anthony
Patented Case
View Patent ↗
Granted: Jul 24, 1984
Filed: Sep 30, 1982
Inventor
John Anthony
Assignee (at issue)
Union Carbide 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.