Hydrophilic polyurethanes containing (meth)acryloyl groups, their use as reactive emulsifiers for radically curable synthetic resins, a water-dispersible mixture of radically curable synthetic resins and an aqueous coating composition based on this mixture
CA 2007097 C · Owner: Bayer Aktiengesellschaft · Inventors: Meixner, Jurgen; Pedain, Josef; Fischer, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polyurethane is disclosed having improved properties as a reactive emulsifier for radically-curable synthetic resins. The polyurethane is obtained by the reaction of a) a polyisocyanate component; b) an alcohol component; and c) a polyethylene glycol component. The reactive emulsifiers are useful in aqueous coating compositions.
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 January 4, 1990 and granted May 23, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 2012.
- 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.