A high voltage electric power line current limiter
CA 2178356 C · Owner: Kida, Junzo · Inventors: Kida, Junzo; Arita, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A current limiter is used for stable control of an electric power system, especially a high voltage system. The current limiter maintaining the voltage below the withstanding level, and it is easy to introduce into the system. The limiting device is inserted between a low potential terminal of a winding of star-connection of a three-phase transformer that has at least one starconnected winding and ground.
Read the whole patent
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 6, 1996 and granted August 28, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 6, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 6, 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.