Aqueous dispersion of a mixture of a polyurethane with a radiation-curable (meth)acrylate prepolymer
CA 2314386 A1 · Owner: Jaworek, Thomas · Inventors: Paulus, Wolfgang; Jaworek, Thomas; Reich, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aqueous dispersions of mixtures of (a) polyurethanes having hydrophilic groups which result in water dispersibility of the polyurethane and (b) radiation-curable (meth)acrylate prepolymers which are dilutable in at least 5% by weight of water such as, hydroxyl-containing polyether acrylates are suitable, owing to, their penetration behavior and their high solids absorption in paper, for use as radiation-curable coating or impregnating materials for paper substrates.
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 19, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 19, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 19, 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.