Sulfonylimides synthesis process
CA 2030809 A1 · Owner: Centre National De La Recherche Scientifique (C.N.R.S.) · Inventors: Armand, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The subject matter of the invention is a process for synthesis of sulfonylimidides of general formula M(RSO2)2Ny in which M represents a metal chosen from among the alkaline metals the alkaline-earth metals, the rare-earths Al, Sc, Y and Th, R represents a monovalent radical chosen from among the aliphatic radicals having 1 to 8 carbon atoms, linear or branched the alicyclic radicals having 3 to 8 carbon atoms the arylic radicals having 3 to 8 carbon atoms and y being a number equal to the valency ofM; and characterised by the fact that an ionic nitride of formula M3Ny in which M and y have the significance given above is made to react with a sulfonyl halide corresponding to the formula …
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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 April 5, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 5, 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.