Cucurbiturils and method for synthesis
CA 2373159 C · Owner: Newsouth Innovations Pty Limited · Inventors: Day, Anthony Ivan; Blanch, John Rodney; Arnold, Alan Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing cucurbitnurils, where n is from 4 to 12 comprising , mixing substituted and/or unsubstituted glycoluril with an acid and a compound that can form methylene bridges between glycoluril units and heating the , mixture to a temperature of from 20~ to 120~ to thereby form cucurbitn. Novel cucurbitnurils, where n = 4, 5, 7 8, 9, 10, 11 and 12 and substituted , cucurbits,uurils where s = number of substituted glycoluril units u = , number of unsubstituted units and s + u = 4 - 12 are also described.
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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 May 5, 2000 and granted April 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2022.
- 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.