Granted Patent
Utility
US 6,164,823 · App. 09/206,473
Valve bag and method for making a valve bag
Inventor:
Roy H. Donnell
Patented Case
View Patent ↗
Granted: Dec 26, 2000
Filed: Dec 7, 1998
Inventor
Roy H. Donnell
Assignee (at issue)
Southern Bag Corporation
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.