A method of producing a factor viii preparation
CA 2094347 C · Owner: Elsinger, Friedrich · Inventors: Eibl, Johann; Schwarz, Otto; Turecek, Peter
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 of producing virus-safe highly purified factor VIII. The method includes a combination of the following measures: a) chromatographic purification of a factor VIIIcontaining fraction, b) tenside treatment of factor VIII in an aqueous solution at a tenside/protein ration of from 1:1 to 1000:1, and, c) heat treatment of the factor VIII preparation in the solid state.
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 April 19, 1993 and granted June 25, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2015.
- 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.