Granted Patent
Utility
US 4,492,333 · App. 06/572,618
Single slice pie carton with slanted openable rear wall and blank for forming same
Inventor:
Harry H. Roberts
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Jan 23, 1984
Inventor
Harry H. Roberts
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.