Improved lightweight and ultra-lightweight portable derails
CA 2270458 C · Owner: Pease, Ronald · Inventors: Pease, Ronald; Hertel, Kevin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved lightweight and ultra-lightweight portable derails are disclosed. A portable derail for installation on railway track to prevent a railcar or locomotive from passing beyond a fixed point thereby protecting workmen and equipment against accidents the derail being very lightweight and portable so a workman can easily carry it from one location to another and yet being designed to function effectively under severe loading conditions and resist any tendency to slide along the rail when subjected to impact.
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 April 30, 1999 and granted July 23, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 30, 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.