Granted Patent
Utility
US 4,883,421 · App. 07/181,709
Directional flow bar extruder
Inventor:
Ronnie Glen Morgan
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Apr 14, 1988
Inventor
Ronnie Glen Morgan
Assignee (at issue)
Nabisco Brands, Inc.
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.