Granted Patent
Utility
US 6,582,808 · App. 09/918,521
Multilayer paperboard packaging structure including polyolefin/polyamide blend layer
Inventors:
Gregory Castle, Dolan R. Johnson, Keith S. Shih, A. Craig Bushman
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: Aug 1, 2001
Inventors
Gregory Castle
Dolan R. Johnson
Keith S. Shih
A. Craig Bushman
Assignee (at issue)
INTERNATIONAL PAPER COMPANY
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.