Fibre optic arrangement for measuring the strength of an electric current
CA 2064020 C · Owner: Peier, Dirk · Inventors: Peier, Dirk; Hirsch, Holger
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fiber optics arrangement for measuring the intensity of an electric current utilizing the Faraday effect in which the magnetic field surrounding the conductor through which the current flows affects the polarization condition of the light, the path of which leads through the core of an optical fiber which surrounds the conductor in the form of a coil. The light coupled out of the optical fiber by, means of a beam splitter is divided into two partial light beams; the intensities, after passage through one polarizer being measured by one photodetector, respectively. Expansion of the measuring range of the arrangement is achieved by the fact that the polarizers are rotated symmetrically with …
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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 July 12, 1990 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 12, 2012.
- 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.