Method of isolating cyclosporins
CA 2257271 C · Owner: Poli Industria Chimica, S.P.A. · Inventors: Magni, Ambrogio; Buran, Vittorio; Bocchiola, Gianettore
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a method for isolating cyclosporin by adsorption chromatrography. The method comprises the steps of: (a) loading a crude solution containig a cyclosporin onto adsorption chromatography column containing an adsorption resin, (b) eluting the cyclosporin from the adsorption chromatography column, and (c) collecting the eluted cyclosporin. The step of eluting the cyclosporin is carried out by passing an eluting solvent through the column, which comprises a hydrophilic component and a lipophilic component, wherein the cyclosporin is separately eluted from other compounds by providing a hydrophilic/lipophilic balance in the eluting solvent that selectively …
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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 June 5, 1997 and granted March 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2019.
- 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.