Acrylamide and trialkylammonium salt copolymer, method for obtaining same and coated textile
CA 2344220 A1 · Owner: Institut Textile Et Chimique De Lyon (Itech) · Inventors: Descheres, Isabelle; Boulon, Gilbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns an acrylamide or acrylamide derivative and trialkylammonium salt copolymer capable of being obtained by radical copolymerisation in the presence of an initiator, of at least a first monomer selected among acrylamide and its derivatives and of a second monomer, selected among trialkylammonium salts corresponding to the following formula (I): H¿2?C = C(R¿1?) - (CH¿2?)¿n? - A - (CH¿2?)¿n'? - N?+¿ (R¿2?) (R¿3?) (R¿4?)X?-¿ wherein: R¿1? represents H or an alkyl group with 1 to 3 carbon atoms; R¿2? R¿3? and R¿4?, identical or different, represent each an alkyl group with 1 to 3 carbon atoms; n and n' represent each independently of one another, a non- integer not more than …
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 July 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2021.
- 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.