Granted Patent
Utility
US 4,460,425 · App. 06/463,237
Method for the manufacture of a packing material with good gas-tightness properties
Inventors:
Jan Axel Ingemar Rauser, Gunnar Knudsen
Patented Case
View Patent ↗
Granted: Jul 17, 1984
Filed: Feb 2, 1983
Inventors
Jan Axel Ingemar Rauser
Gunnar Knudsen
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.