Power converter protective apparatus using mechanical and semiconductor bypass means
CA 2178862 C · Owner: Aritsuka, Tomohiko · Inventors: Aritsuka, Tomohiko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A power converter protective apparatus for protecting an AC-DC converter against an excess fault current by preventing the fault current of a power system from flowing into the AC-DC converter. The protective apparatus comprises a series transformer whose primary winding is connected in series with a power system and whose secondary winding is connected to a voltage-type AC- DC converter first current bypass means of a normally open-type connected in parallel with the primary winding a current transformer for detecting a fault current in the power system and a control unit for outputting a bypass control signal to the first current bypass means when the current transformer detects the fault …
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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 June 12, 1996 and granted August 15, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2018.
- 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.