Granted Patent
Utility
US 4,851,286 · App. 07/284,776
Foamed plastic cushioning materials
Inventor:
Walter E. Maurice
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Dec 12, 1988
Inventor
Walter E. Maurice
Assignee (at issue)
United Foam Plastics
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.