Electric power system protection and control system and distributed control system
CA 2223260 C · Owner: Kabushiki Kaisha Toshiba · Inventors: Sekiguchi, Katsuhiko; Masui, Michio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric power system protection and control system including a plurality of protection controllers each for, executing protection and control of an electric power system by inputting a status quantity of the electric power system and for converting the status quantity into digital data and, a display controller connected to each of the protection controllers via a communication network for displaying and, controlling an operation and status of each of the protection controllers for monitoring. Each of the protection controllers includes a core area not directly connected to the communication network for executing the protection and control of the electric power system, and a web area …
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 December 2, 1997 and granted March 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 2, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 2, 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.