Copolymers of (meth)acryloxy-alkyl-siloxysilane and alkyl(meth)acrylates and the use thereof as pressure sensitive adhesives
CA 2115714 A1 · Owner: Berner, Bret · Inventors: Li, Xiaoling; Berner, Bret
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract, The present invention relates to copolymers of certain siloxy silanes and alkyl (meth)acrylate. Especially preferred is the embodiment wherein the silyloxy silane is 3-methacryloxypropyl-tris(trimethylsilyloxy)-silane and the alkyl (meth)acrylate is 2-ethylhexyl acrylate. It further relates to pressure sensitive adhesives especially medical, adhesives, suitable for use in transdermal therapeutic systems (TTS).
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 February 15, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 15, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 2016.
- 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.