Granted Patent
Utility
US 6,565,256 · App. 10/020,827
Bulk bag for dense materials
Inventors:
Norwin C. Derby, Craig Alan Nickell
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Dec 11, 2001
Inventors
Norwin C. Derby
Craig Alan Nickell
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.