Granted Patent
Utility
US 4,295,259 · App. 05/951,132
Method of filling spike holes in railway ties
Inventors:
Curtis A. Rhodes, Tim A. Jur, Donald A. Keating
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Oct 13, 1978
Inventors
Curtis A. Rhodes
Tim A. Jur
Donald A. Keating
Assignee (at issue)
Canron 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.