Granted Patent
Utility
US 4,291,827 · App. 06/126,376
Carton with self-locking end closure and blank for forming same
Inventor:
Terence J. Mulroy
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Mar 3, 1980
Inventor
Terence J. Mulroy
Assignee (at issue)
Champion International Corporation Limited
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.