Granted Patent
Utility
US 4,248,351 · App. 05/917,201
Packaging container with a pouring spout
Inventor:
Nils Berg
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Jun 20, 1978
Inventor
Nils Berg
Assignee (at issue)
Tetra Pak International AB
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.