Granted Patent
Utility
US 4,892,227 · App. 07/184,278
High barrier plastic container and method of making same
Inventor:
Donald N. MacLaughlin
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Apr 21, 1988
Inventor
Donald N. MacLaughlin
Assignee (at issue)
Packaging Resources Incorporated
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.