Superconducting material and method for preparing superconducting materials
CA 2181601 C · Owner: Tholence, Jean-Louis · Inventors: Chaillout, Catherine; Capponi, Jean-Jacques; Alario-Franco, Miguel Angel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for preparing a superconducting material by preparing a precursor consisting of a powder of Ba2Can-1Cun+1Ox or Ba2Can-1Cun+1Ox wherein n is an integer greater than 1 and x is greater than 2n+2; mixing the powder with silver oxide powder optionally in the presence of excess copper oxide in an amount of one mole of the precursor for one to three moles of silver oxide; and carrying out high-temperature high-pressure heating.
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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 January 19, 1995 and granted March 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 19, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2017.
- 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.