Granted Patent
Utility
US 4,931,346 · App. 07/287,562
Lightweight laminated paperboard
Inventor:
D. Juan Nogueras Dardina
Patented Case
View Patent ↗
Granted: Jun 5, 1990
Filed: Dec 19, 1988
Inventor
D. Juan Nogueras Dardina
Assignee (at issue)
Book Covers Inc.
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.