Method and system for checking track integrity
CA 2498927 C · Owner: Siemens Rail Automation Corporation · Inventors: Shockley, James Francis; Hickenlooper, Harrison Thomas; Kane, Mark Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A train control system includes a control module that determines a position of a train using a positioning system and consults a database to determine when the train is approaching a portion of track monitored by a track circuit. When the train is near a track circuit, but while the train is still far enough away from the track circuit such that the train can be stopped before reaching the portion of track monitored by the track circuit the train transmits an , interrogation message to a transceiver associated with the track circuit. When the track circuit receives the interrogation message a test is initiated. The , test results are transmitted back to the train. The train takes …
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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
- Filed October 10, 2003 and granted June 14, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2025.
- 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
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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.