Granted Patent
Utility
US 4,530,461 · App. 06/547,868
Sift resistant economy seal carton
Inventor:
David J. Adamek
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: Nov 2, 1983
Inventor
David J. Adamek
Assignee (at issue)
Champion International Corporation Limited
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.