Granted Patent
Utility
US 6,315,448 · App. 09/434,956
Multiwall bag with peelable opening
Inventor:
Ronald G. Thrall
Patented Case
View Patent ↗
Granted: Nov 13, 2001
Filed: Nov 5, 1999
Inventor
Ronald G. Thrall
Assignee (at issue)
Bemis Associates, Inc.
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.