Canadian application, no grantCanada
Crosslinked amylopectin by reactive extrusion and its use as an absorbent or superabsorbent material
CA 2423712 A1 · Owner: Nourry, Nicolas · Inventors: Couture, Claude; Bergeron, David; Nourry, Nicolas
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to crosslinked amylopectin as well as to the preparation of a crosslinked amylopectin based absorbent or superabsorbent. The crosslinked amylopectin is prepared by reactive extrusion.
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 March 26, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 26, 2003
GrantedNo grant recorded
Term endedMarch 26, 2023
Patent numberCA 2423712 A1
Classification (IPC)B01J20/24 +2 more
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.