Gate pulse generator of a reactive power compensation device
CA 2040211 C · Owner: Ogiwara, Hideshi · Inventors: Ogiwara, Hideshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gate pulse generator for a reactive power compensation device in which a capacitor is connected in series with antiparallel connected thyristors and which is so constructed that triggering pulses are produced and current is passed into said capacitor when both a signal of forward voltage imposed on said thyristors and a thyristor conduction period signal that is reset by a phase control signal are present. The gate pulse generator includes a means by which conduction period signals associated with thyristors of one polarity are reset during conduction if both a triggering pulse of thyristors of the opposite polarity and a delayed phase control signal associated with the opposite polarity …
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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 April 11, 1991 and granted August 5, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2013.
- 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.