Process for the preparation of a stable factor viii
CA 2022650 C · Owner: Heimburger, Norbert · Inventors: Wellner, Klaus; Heimburger, Norbert; Kumpe, Gerhardt
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of a pasteurized factor VIII concentrate with high specific activity and stability is described, which comprises adsorbing impurities from the solution containing the factor VIII by at least two-fold adsorption with Al(OH)3, an anion exchanger or Ca3(PO4)2, preferably with two different adsorbents from this group.
Read the whole patent
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 3, 1990 and granted June 5, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 3, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 3, 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.