Process for reducing eddy currents in a superconductor strip, and a superconductor arrangement
CA 2018681 C · Owner: Abb Schweiz Holding Ag · Inventors: Dersch, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arrangement of electrically anisotropic high-temperature superconductors (A1, A2) on a non-superconducting metal strip (1) for alternating-current applications such as magnets and electrical machines is, specified in the case of which a relatively simple reduction of alternating-current losses is achieved in that at least one strip (A1, A2), deposited as a layer made of a high-temperature superconductor spirally, surrounds this metal strip. The superconducting strip (A1, A2) has a preferred direction in which the critical current density is smaller than in all other directions. In this arrangement a current (i) flowing through the, superconductor flows periodically through regions of the …
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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 11, 1990 and granted January 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 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
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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.