Circuit interrupting device with lock out and reversible wiring
CA 2515004 C · Owner: Leviton Manufacturing Co. Inc. · Inventors: Disalvo, Nicholas L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A resettable circuit interrupting device such as a GFCI (10) that is immune to the problem of reverse wiring and, therefore has load-line terminals (36, 40) , that can be interchangeably connected to either at least one load or to a power source. The device comprises two differential transformers (DT DT~), one to detect leakage current when the load is connected to the load terminals, and the second coupled to detect leakage current when the load is connected to the line terminals.
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 February 2, 2004 and granted April 1, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 2026.
- 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.