Granted Patent
Utility
US 4,981,254 · App. 07/517,581
Top structure for a collapsible carton
Inventor:
John T. Depper
Patented Case
View Patent ↗
Granted: Jan 1, 1991
Filed: May 1, 1990
Inventor
John T. Depper
Assignee (at issue)
Inland 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.