Film made of acrylate terpolymer mixtures and the use thereof
CA 2199775 A1 · Owner: Wolff Walsrode Ag · Inventors: Schultze, Dirk
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a film made of acrylate terpolymer blends which, substantially consists of mixtures of soft acrylate polymers which themselves are, synthesised from acrylate styrene and acrylonitrile monomers, with thermoplastic polyurethanes having Shore hardnesses of less than 90 A as measured according to DIN 53 505.
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 March 12, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 12, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 12, 2019.
- 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.