Superconductor jointed structure
CA 2013357 C · Owner: Sakai, Hitoshi · Inventors: Yoshida, Hitoshi; Sakai, Hitoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A jointed structure comprising at least two kinds of oxide superconductor having different melting points higher, melting point superconductor and one lower melting point oxide superconductor being alternately jointed. In this jointed structure, the lower melting oxide superconductor is used as a joint layer for the higher melting oxide superconductors. The jointed structure can be obtained by combining an Y-Ba-Cu-O oxide superconducting material and a Bi-Sr-Ca-Cu-O oxide superconducting material or by combin-, ing two Bi-Sr-Ca-Cu-O oxide superconducting materials of different compositions and accordingly of different melting points. Large cylindrical structures used as for example, a …
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 March 29, 1990 and granted March 19, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 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.