Metal coating coupling composition
CA 2417322 A1 · Owner: Zhang, Jun Qing · Inventors: Zhang, Jun Qing
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A metal-coupling composition composed of silane cross-linking and coupling agents wherein the coupling agent includes a vinyl moiety. The coupling composition is a replacement for iron-phosphatizing / chromate primering and chromate primering in zinc phosphatizing processes. In a preferred embodiment the, silane cross-linking agent has the following formula: and X is a trivalent group, each Y is independently a divalent group or series of, divalent groups, each Q is independently -R or -OR and each R is independently a, C1-10 alkyl group or aryl group, and -OR group(s) are hydrolysable; and the silane coupling agent has the following formula: each Q is independently -R or -OR and each R …
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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 January 24, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 24, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 2025.
- 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.