Granted Patent
Utility
US 5,531,376 · App. 08/514,913
Paperboard container with integral paperboard pour spout
Inventors:
Thomas J. Brink, James L. Stone
Patented Case
View Patent ↗
Granted: Jul 2, 1996
Filed: Aug 14, 1995
Inventors
Thomas J. Brink
James L. Stone
Assignee (at issue)
Packaging Corporation of America
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.