Granted Patent
Utility
US 4,387,749 · App. 06/300,038
Filler sleeve for use in conjunction with a bag adapted to contain a granular product
Inventor:
Frederick A. Donisi
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Sep 8, 1981
Inventor
Frederick A. Donisi
Assignee (at issue)
Champion International Corporation Limited
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.