Granted Patent
Utility
US 5,472,041 · App. 08/080,431
Railroad rail and method and system of rolling the same by conventional or continuous rolling process
Inventors:
Robert L. Cryderman, John C. Winkley
Patented Case
View Patent ↗
Granted: Dec 5, 1995
Filed: Jun 18, 1993
Inventors
Robert L. Cryderman
John C. Winkley
Assignee (at issue)
CF&I STEEL L.P.
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.