Electrical inverter with a silicon controlled rectifier full-bridge circuit
CA 2251883 C · Owner: Amsdell Inc. · Inventors: Wu, Fu Ning
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An inverter for converting a DC voltage into an AC voltage comprising a fullbridge circuit having four silicon controlled rectifier (SCR) switches two , pulse control circuits for generating control voltage signals to turn on alternate pairs of said switches, a time sequencing circuit and a power , switch circuit. The full bridge circuit is directly connected to a positive DC input terminal and is coupled through the power switch circuit to a negative DC input terminal. The time sequencing circuit generates a first pulse signal for controlling the first pulse control circuit and a second pulse signal for controlling the second pulse control circuit so that the first pulse signal and …
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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 March 18, 1997 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 18, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 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.