Granted Patent
Utility
US 6,328,471 · App. 09/456,342
Pinch bottom bag with easy open feature
Inventor:
Edward D. Culbertson
Patented Case
View Patent ↗
Granted: Dec 11, 2001
Filed: Dec 8, 1999
Inventor
Edward D. Culbertson
Assignee (at issue)
Stone Container 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.