Granted Patent
Utility
US 4,284,448 · App. 05/972,802
Method and an arrangement for the manufacture of casings
Inventors:
Herwig Pupp, Otto B. Andersson, Jan Nilsson
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: Dec 26, 1978
Inventors
Herwig Pupp
Otto B. Andersson
Jan Nilsson
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.