Granted Patent
Utility
US 4,657,614 · App. 06/720,871
Method for making a laminated material
Inventor:
Thorbjorn Andersson
Patented Case
View Patent ↗
Granted: Apr 14, 1987
Filed: Apr 8, 1985
Inventor
Thorbjorn Andersson
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.