Ground fault circuit interrupter
CA 2064027 C · Owner: Kenny, Liam · Inventors: Glennon, Oliver; Kenny, Liam
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ground fault circuit interrupter (1) which continues to provide ground fault protection in the event of loss of neutral includes a blocking device formed by a pair of back-to-back Zener diodes (D7 D8) which complete an energizing path for a circuit breaker on loss of neutral. The circuit interrupter (1) also includes a standby rectifier circuit formed by a pair of diodes (D5 D6), which complete a full wave rectifier having line (2) and earth (4) inputs in the event of loss of neutral (3).
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 May 17, 1990 and granted September 26, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 2012.
- 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.