Granted Patent
Utility
US 4,256,791 · App. 06/094,387
Weblike laminated packing material and a method for the manufacture of such a material
Inventors:
Sven N. H. Holmstrom, Knut A. Rosenberg
Patented Case
View Patent ↗
Granted: Mar 17, 1981
Filed: Nov 15, 1979
Inventors
Sven N. H. Holmstrom
Knut A. Rosenberg
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.