Fiber optic current sensor
CA 2329963 C · Owner: Nehring, Jurgen · Inventors: Bohnert, Klaus; Nehring, Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a fiber optic current sensor having a coiled sensor fiber (1) which encloses a current conductor (S) and at least one phase delay element (4 5) adjoining the sensor fiber (1), the at least one phase delay element (4 5) has a phase delay with a temperature dependence such that it at least approximately compensates for a temperature dependence of a Verdet's constant (V)of the sensor fiber (1). It is thereby possible to achieve an at least approximately temperature-independent sensor signal.
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 29, 2000 and granted June 7, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 29, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 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
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.