Method for the preparation of precursors for superconductors and compounds thus obtained
CA 2101896 C · Owner: Pirelli Cavi E Sistemi S.P.A. · Inventors: Szabo Miszenti, Giorgio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method for the preparation of a precursor for a superconductor, comprising the addition of a condensation product to an aqueous solution of metal salts the total or, partial removal of water from the mixture thus obtained the, subsequent processing of the viscous mass obtained after having removed part of the water or the calcination of the solid gel obtained after having substantially removed all the water wherein the condensation product is a product of esterification of citric acid with ethylene glycol prepared separately and the solution of metal salts substantially is a solution of acetates in water and acetic acid.
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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 August 4, 1993 and granted February 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 4, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 4, 2015.
- 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.