A monitor circuit for a current limiting device
CA 2340397 C · Owner: Jokiniemi, Timo · Inventors: Rajala, Erkki; Struempler, Ralf; Jokiniemi, Timo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric monitor circuit for monitoring a status of a three-phase current limiting device for a three-phase line is described. The monitor circuit comprises three one-phase current limiting thermal fuses or PTC resistors. The electric monitor circuit also has six taps one respective tap , for a first and a second side of each current limiting thermal fuse or PTC resistor. The taps are divided into two groups of three taps each. The electric monitor circuit also has two star points with the three taps in each group being connected to one respective star point for each group via a respective resistor. The electric monitor circuit also has a voltage detector for detecting a …
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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 13, 2000 and granted August 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 13, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 13, 2022.
- 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
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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.