Process for producing frogs of railway switches
CA 1313610 C · Owner: Voest-Alpine Eisenbahnsysteme Gesellschaft M.B.H. · Inventors: Pirker, Robert; Schrotter, Ernst; Rotter, Franz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A b s t r a c t, In a process for producing frogs of railway switches or rail pieces located in the area of switches which is hit by the wheels comprising a highly wear-resistent surface layer which is travelled upon by the wheels, of an age-hardening steel of the composition, C 0.01 to 0.05 % Al 0 to 0.2 % Si 0.01 to 0.2 % B 0 to 0.1 %, Mn 0.01 to 0.2 % Zr 0 to 0.1 % Co 0 to 15 %, Mo 1.5 to 6 %, Ni 7 to 20 % Ti 0.1 to 1 %, Cr 0 to 13 %, the surface layer to be travelled upon by the wheels is applied by explosion plating or electron beam welding or roll plating onto a base body of a well weldable steel in particular a steel comprising not more than 0.24 % C not more than 0.04 % P and S, …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2010.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.