Granted Patent
Utility
US 4,744,669 · App. 06/922,202
Mixing and extruding apparatus and methods
Inventors:
James E. Kowalczyk, Bernard A. Loomans
Patented Case
View Patent ↗
Granted: May 17, 1988
Filed: Oct 23, 1986
Inventors
James E. Kowalczyk
Bernard A. Loomans
Assignee (at issue)
Baker Perkins 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.