Granted Patent
Utility
US 4,230,261 · App. 06/030,009
Lunch box carton and a blank for forming same
Inventor:
John J. Austin
Patented Case
View Patent ↗
Granted: Oct 28, 1980
Filed: Apr 16, 1979
Inventor
John J. Austin
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.