Granted Patent
Utility
US 4,712,688 · App. 06/711,285
Double breakapart carton with sealable ends and blank for forming the same
Inventor:
Herbert L. Lambert
Patented Case
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Granted: Dec 15, 1987
Filed: Mar 13, 1985
Inventor
Herbert L. Lambert
Assignee (at issue)
Waldorf Corporation
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.