Granted Patent
Utility
US 4,331,235 · App. 06/182,965
Container with vent and blanks for forming same
Inventor:
David J. Brundage
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Sep 2, 1980
Inventor
David J. Brundage
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.