Tunnel junction device composed of compound oxide superconductor material and method for fabricating the same
CA 2030713 C · Owner: Tanaka, Saburo · Inventors: Yazu, Shuji; Tanaka, Saburo; Nakanishi, Hidenori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tunnel junction device includes a pair of superconduction layers formed of a compound oxide superconductor material and a non-superconduction layer formed between the pair of superconduction layers. The non-superconductive material layer is formed of a compound oxide superconductor material which is substantially the same as that of the first and second superconduction layers but which is doped with a dopant of an amount sufficient for the compound oxide superconductor material to lose the superconduction property. The first superconduction layer the, non-superconductive material layer and the second superconduction layer have a continuous crystal lattice as a whole. The above mentioned …
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 November 27, 1990 and granted November 18, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 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.