Granted Patent
Utility
US 4,266,716 · App. 06/115,021
Carton with pyramid-shaped bottom and blank for forming same
Inventor:
John J. Austin
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Jan 24, 1980
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.