A surge suppression network responsive to the rate of change of power disturbances
CA 2311137 C · Owner: Ha, Chi Thuong · Inventors: Ha, Chi Thuong; Funke, James; Kladar, Dalibor
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A surge suppression network for single and multiphase ac systems has a voltage clamping device connected in series with a gated crowbar device across the supply voltage in parallel with the load to be protected. A trigger circuit gates the crowbar device on in response to a specified rate of change of the supply voltage indicative of a surge. For higher levels of surge current shunting pluralities of clamping devices and crowbar devices can be connected in parallel with a single trigger circuit simultaneously tinning on all of the crowbar devices for each phase. For crowbar devices such as TRIACs with different response characteristics to positive and negative surges and for unipolar …
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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 2, 2000 and granted November 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 2, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 2, 2022.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.