Granted Patent
Utility
US 4,730,769 · App. 06/850,932
Packaging for liquids and process and apparatus for its manufacture
Inventor:
Sven O. S. Stark
Patented Case
View Patent ↗
Granted: Mar 15, 1988
Filed: Apr 11, 1986
Inventor
Sven O. S. Stark
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.