Granted Patent
Utility
US 5,203,633 · App. 07/765,206
Spread strap flexible bulk container
Inventor:
Norwin C. Derby
Patented Case
View Patent ↗
Granted: Apr 20, 1993
Filed: Sep 25, 1991
Inventor
Norwin C. Derby
Assignee (at issue)
Super Sack Mfg. Corp.
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.