Externally controllable circuit breaker
CA 2425714 C · Owner: Simms, Kevin A. · Inventors: Davidson, David L.; Uhlman, Kenneth L.; Adamson, Wayne G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An externally controllable circuit breaker includes a set of main contacts an operating mechanism for opening and closing the main contacts; and a set of secondary contacts electrically connected in series with the main contacts. A control mechanism to open and close the secondary contacts includes an electromagnet with an armature having a first position which opens the secondary contacts, and a second position which closes the secondary contacts. The electromagnet also includes a coil electrically interconnected with the main contacts for energization therefrom and adapted for control by one or two external signals from one or two external contacts to operate the armature between the …
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 15, 2003 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 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
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.