Electronic device for converting electric power
CA 2183789 C · Owner: Gec Alsthom Transport Sa · Inventors: Meynard, Thierry; Carrere, Philippe; Lavieville, Jean-Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Multilevel converter comprising particularly a capacitor (C1 C2... Cn) and two switches (T1, T'1, for example) for each of its cells. The cells operate successively within a period which is repeated at a converter frequency. In parallel to the charge (C) a filtering circuit (CF) is provided to dissipate the energy from any component having a fundamental frequency corresponding to said converter period. It comprises one or a plurality of series circuits of the RLC type.
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 28, 1995 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 28, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 28, 2017.
- 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.