Ecp train line communications for railway freight car brakes
CA 2292002 C · Owner: Kull, Robert C. · Inventors: Kull, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A low power ECP tramline communication method is provided wherein power consumption by each freight car's on-board ECP transceiver is minimized such that it can be, powered indefinitely by a standard locomotive battery. The low power communication method, includes normally maintaining each car's ECP transceiver in a sleep mode until signaled by the, locomotive master controller to wake it up. The wake-up command for the ECP transceiver can, be sensitive to the length of the message sent by the MC. Alternative or , additional methods of, identifying a wake-up message from the MC can include using the signal strength of the message, and making the wake-up command sensitive to the ECP …
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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 December 9, 1999 and granted February 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 9, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 9, 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.