Method and system for welding railroad rails
CA 2281979 A1 · Owner: Morlock, Michael J. · Inventors: Morlock, Michael J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of gas shielded are welding steel rails spaced from each other to define a, longitudinal gap therebetween comprises the steps of providing an elongated steel barrier plate, across the gap at the bottom of the spaced rails and filling the gap above , the barrier plate with a molten steel from an advancing filler metal electrode by a gas shielded electric arc welding process. The barrier plate has a central portion received in the gap and longitudinally extending recesses, laterally outwardly adjacent to the central portion and which underlie the bottoms of the rails at the, bottom of the gap.
Read the whole patent
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
- Filed September 7, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 7, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 2021.
- 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.