Method for isolation of highly pure von willebrand factor
CA 2201714 C · Owner: Mundt, Wolfgang · Inventors: Falkner, Falko-Gunter; Mundt, Wolfgang; Den-Bouwmeester, Renate
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for isolation of highly pure von Willebrand Factor in which recombinant von Willebrand Factor (rvWF) is chromatographically purified by anion exchange chromatography on an anion exchanger of the quaternary amino type in a buffer solution comprising buffer substances and optionally salt. The buffer solutions are preferably free of stabilizers amino acids and other additives. According to this method highly pure recombinant vWF can be obtained which is free, from blood plasma proteins especially free from Factor VIII, and is physiologically active. Further the invention relates to a pharmaceutical preparation that contains rvtWF, which is comprised of …
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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 October 2, 1995 and granted July 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 2, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 2, 2017.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.