Power converter
CA 2223068 C · Owner: Kawaguchi, Akira · Inventors: Kawaguchi, Akira
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power converter comprises parallel circuits by providing two series circuits composed by self-arc- suppressing semiconductors, reactors and diodes. Moreover unbalance of the currents flowing in the two parallel circuits is prevented by connecting the terminals of the two reactors to each other via capacitors.
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 1, 1997 and granted August 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 1, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 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.