Granted Patent
Utility
US 5,213,255 · App. 07/939,581
Opening structure for wedge-shaped pie carton
Inventor:
Raymond A. Cote
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Sep 3, 1992
Inventor
Raymond A. Cote
Assignee (at issue)
Waldorf 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.