Granted Patent
Utility
US 4,396,453 · App. 06/373,894
Process of preparing corrugated paper board with a particular carboxylated styrene-butadiene copolymer starch-based corrugating adhesive composition
Inventor:
Paul L. Krankkala
Patented Case
View Patent ↗
Granted: Aug 2, 1983
Filed: May 3, 1982
Inventor
Paul L. Krankkala
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.