Granted Patent
Utility
US 4,569,443 · App. 06/373,010
Carton with tamper-proof pouring spout
Inventor:
Harry I. Roccaforte
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Apr 29, 1982
Inventor
Harry I. Roccaforte
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.