Water dispersible polyamides with ethylenically unsaturated ends
CA 2374493 A1 · Owner: Atofina · Inventors: Linemann, Reinhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns polyamides having both highly hydrophilic groups and unsaturations and therefore, water dispersible and polymerisable. The hydrophilic groups are distributed along the chain while the unsaturations are located at the ends. The inventive polyamides are useful for various applications in particular for preparing close mixtures of polyamides and vinyl acrylic and/or styrene polymers.
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 May 16, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 16, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 16, 2022.
- 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.