Method for enzymatic treatment of lignocellulosic materials, in particular cellulose pulps
CA 2120949 A1 · Owner: Buchert, Johanna · Inventors: Viikari, Liisa; Buchert, Johanna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns a method for enzymatic treatment of lignocellulosic materials, in particular cellulose pulps. According to a method of this kind the material is contacted with an , enzyme preparation having hemicellulase cellulase and/or, ligninase activity in order to hydrolyse the hemicelluloses cellulose, and/or lignin thereof. According to the invention the, counter-ions of the carboxylic groups of the lignocellulosic material are modified before the enzymatic treatment in order to render the material more suitable for enzymatic treatment. By changing the nature of the counter-ions of the carboxylic acids or by changing their degree or dissociation, it is possible to …
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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 12, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 12, 2014.
- 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
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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.