Granted Patent
Utility
US 4,464,156 · App. 06/351,868
Method of manufacturing parallelepipedic packing container provided with an opening arrangement
Inventor:
Sven N. H. Holmstrom
Patented Case
View Patent ↗
Granted: Aug 7, 1984
Filed: Feb 24, 1982
Inventor
Sven N. H. Holmstrom
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.