Mono and di-derivatives of cyclodextrins, their synthesis and purification and their use as support
CA 2243640 A1 · Owner: Chiralsep S.A.R.L. · Inventors: Duval, Raphael; Leveque, Hubert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention describes perfectly defined mono- and di-derivatives of cyclodextrins a method for their synthesis and purification functionalized cyclodextrins obtained from these derivatives and the synthesis of supports comprising the cyclodextrin derivatives. It also describes the use of the said supports in the preparation or separation of enantiomers or in asymmetrical synthesis, or in catalysis or in the preparation or separation of geometric or positional isomers or in the preparation or separation of hydrophobic organic molecules.
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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 28, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2020.
- 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.