Granted Patent
Utility
US 4,820,892 · App. 07/169,140
Heating arrangement for packing containers holding liquid contents
Inventors:
Gert Holmstrom, Paul Mellbin
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Mar 10, 1988
Inventors
Gert Holmstrom
Paul Mellbin
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.