Granted Patent
Utility
US 4,391,310 · App. 06/304,358
Bag filler spout
Inventor:
J. George Lepisto
Patented Case
View Patent ↗
Granted: Jul 5, 1983
Filed: Sep 22, 1981
Inventor
J. George Lepisto
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.