Granted Patent
Utility
US 4,240,575 · App. 06/036,947
Egg carton with crush resistant top
Inventor:
Charles H. Tange
Patented Case
View Patent ↗
Granted: Dec 23, 1980
Filed: May 7, 1979
Inventor
Charles H. Tange
Assignee (at issue)
Mobil Oil Corporation
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.