Granted Patent
Utility
US 5,642,800 · App. 08/611,359
Belt conveyor idler roll seal
Inventor:
Charles East
Patented Case
View Patent ↗
Granted: Jul 1, 1997
Filed: Mar 5, 1996
Inventor
Charles East
Assignee (at issue)
FMC 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.