Method for purifying an enzyme and purified enzyme produced according to this method, as well as use of the enzyme
CA 2447818 C · Owner: Nordmark Arzneimittel Gmbh & Co. Kg · Inventors: Schmidbauer, Stefan; Kurfurst, Manfred
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 purifying at least one enzyme obtained in an excess fermentation of Clostridium histolyticum. It is provided for that the enzymes of the excess fermentation are separated by a multistage chromatography method by exclusively using chromatography materials on styrene/divinylbenzene base and/or on base of in particular ceramic hydroxylapatite.
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 June 1, 2002 and granted January 4, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2024.
- 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.