High-voltage switch with resistor insertion upon closing
CA 2206950 C · Owner: Gec Alsthom T & D Sa · Inventors: Perret, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A high-voltage switch with resistor insertion (3) on closing characterized by a resistor (3) inserted by means of a fixed insertion electrode (13) operating in conjunction with the mobile main contact tip (16) the air inlet (22), and the arcing contact (30-30-A) of the mobile assembly being secured relative to each other with this module being made mobile in relation to the mobile assembly in such a way that when actuated the inertia of said module causes the arcing contacts to separate after sufficient separation between the insertion electrode and the mobile main contact tip.
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 12, 1997 and granted February 29, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 12, 2019.
- 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.