Methods of purifying recombinant human erythropoietin from cell culture supernatants
CA 2704598 A1 · Owner: Criscuolo, Marcelo · Inventors: Carcagno, Carlos Miguel; Vidal, Juan Alejandro; Criscuolo, Marcelo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates, in general to a method of purifying, recombinant human erythropoietin (EPO). The present invention also relates to a substantially pure EPO. The method comprises a differential precipitation an, hydrophobic interaction chromatography various concentration and, diafiltration steps tandem anionic and cationic exchange chromatographies and molecular exclusion chromatography for the obtaining of pure EPO. The method does not comprise high performance liquid chromatography steps. The invention also comprises the EPO obtained according to the claimed procedure.
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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 November 8, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 8, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 8, 2021.
- 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.