Granted Patent
Utility
US 4,305,524 · App. 06/137,453
Round ice cream carton lid
Inventors:
Edwin C. McLaren, David J. Adamek
Patented Case
View Patent ↗
Granted: Dec 15, 1981
Filed: Apr 4, 1980
Inventors
Edwin C. McLaren
David J. Adamek
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.