Hybrid medium voltage circuit breaker
CA 2031334 C · Owner: Bolongeat-Mobleu, Roger · Inventors: Bolongeat-Mobleu, Roger; Malkin, Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The circuit breaker comprises main contacts 26,30 and a vacuum cartridge 38 in parallel which performs breaking the assembly, being contained in an enclosure 10 filled with sulphur hexafluoride. The cartridge is designed for dielectric withstand in this gas. The contacts of the cartridge 38 are made of refractory material and a coil generates an axial magnetic field in the arcing zone.
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 December 3, 1990 and granted August 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 3, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 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.