Granted Patent
Utility
US 4,486,248 · App. 06/405,514
Method for the production of improved railway rails by accelerated cooling in line with the production rolling mill
Inventors:
Robert J. Ackert, Robert W. Witty, Peter Crozier
Patented Case
View Patent ↗
Granted: Dec 4, 1984
Filed: Aug 5, 1982
Inventors
Robert J. Ackert
Robert W. Witty
Peter Crozier
Assignee (at issue)
Algoma Steel 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.