Granted Patent
Utility
US 4,446,963 · App. 06/321,317
Return chain roller support for en masse conveyor
Inventor:
Elmer J. Renner
Patented Case
View Patent ↗
Granted: May 8, 1984
Filed: Nov 13, 1981
Inventor
Elmer J. Renner
Assignee (at issue)
Allis-Chalmers 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.