Aqueous compositions containing mixtures of silane-functional resins
CA 2307367 A1 · Owner: Roesler, Richard R. · Inventors: Gindin, Lyubov K.; Roesler, Richard R.
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 aqueous compositions containing a mixture of, a) 50 to 95% by weight, based on the resin solids content of components a) and b), of an aqueous polyurethane/urea dispersion containing 0.5 to 6% by weight, based on the weight of the polyurethane/ureas, of alkoxysilane groups (calculated as Si MW, 28) and, b) 5 to 50% by weight, based on the resin solids content of components a) and b), of a water reducible oligomer which is substantially free from isocyanate groups and has an alkoxysilane group content (calculated as Si, MW 28) of 1 to 6% by weight based on the weight of the oligomer, and wherein the alkoxysilane groups are incorporated as the reaction product …
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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 May 2, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 2, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 2022.
- 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.