Silicone paint additive
CA 2030749 A1 · Owner: Dow Corning Kabushiki Kaisha · Inventors: Mizushima, Kiyoshi; Akinaga, Keiichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An organopolysiloxane terpolymer containing at least, one epoxy group and at least one polyoxyalkylene group each, bonded to silicon atoms thereof through a divalent hydrocarbon group, is disclosed. The terpolymer of the present invention finds particular utility as an additive to paint compositions imparting improved recoating and steam resistance character to the hardened paint films.
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 23, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 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.