Granted Patent
Utility
US 4,566,928 · App. 06/518,489
Method of manufacturing packing container having tear-up opening arrangement
Inventor:
Hans Rausing
Patented Case
View Patent ↗
Granted: Jan 28, 1986
Filed: Jul 29, 1983
Inventor
Hans Rausing
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.