Copolymer having at least one alkoxy or hydroxy polyalkylene glycol functionality and its use
CA 2505074 C · Owner: Omya Development Ag · Inventors: Buri, Matthias; Gane, Patrick; Kaessberger, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns the technical field of mineral material suspensions and before and/or after drying their uses in paper paint and after drying in plastic materials. The invention also concerns the use of a copolymer having at least one alkoxy- or hydroxy-polyalkylene glycol function grafted on at least one ethylenically unsaturated monomer as an agent for enhancing the gloss of the final product and in particular gloss of a paper sheet whatever the angle of vision.
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 November 7, 2003 and granted September 23, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 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.
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.