Granted Patent
Utility
US 5,090,616 · App. 07/742,254
Folding carton blank and method of forming same
Inventor:
Raymond O. Bertsch
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Aug 8, 1991
Inventor
Raymond O. Bertsch
Assignee (at issue)
Riverwood Natural Resources 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.