Cellulose solutions in ionic liquids
CA 2604557 C · Owner: Maase, Matthias · Inventors: Stegmann, Veit; Maase, Matthias
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 solution containing cellulose and an ionic liquid containing anions and cations as a solvent the cations being provided with at , least one atom selected among the group comprising nitrogen oxygen, sulfur, and phosphorus supplied in a protonated form. Also disclosed are methods for the production and use thereof for a physical and chemical treatment.
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 7, 2006 and granted June 21, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 7, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.