Siloxane soluble (m/q) resins with amine and amide organofunctionality
CA 2047310 A1 · Owner: Dow Corning Corporation · Inventors: Varaprath, Padmakumari J.; Wright, Antony P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Organosilicon amine capped resins are prepared by reacting silanol siloxane resins with a cyclic silazane. The product organosilicon amine capped resins are reacted with an acyl halide to yield siloxane resins with amide organofunctionality. The later reaction is especially useful for obtaining acrylamide organofunctionality which is polymerizable and useful in formulating coating compositions such as pressure sensitive adhesives.
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 17, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 17, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 17, 2013.
- 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.