Aminoplast anchored trisaryl-triazine uv absorber
CA 2333273 A1 · Owner: Gupta, Ram B. · Inventors: Sassi, Thomas P.; Gupta, Ram B.; Haacke, Gottfried
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel class of UV absorbers, ortho-hydroxyphenyl substituted triazine compounds bonded to aminoplast resins is provided. Compared to unanchored stabilizers, the anchored stabilizers disclosed herein have increased compatibility with coating resins and have reduced volatility due to higher molecular weights resulting from anchoring. A process for preparing the anchored stabilizers by the reaction of triazines containing active hydrogen with alkoxymethylated aminoplasts in the presence of a catalytic amount of acid. The novel ortho-hydroxylphenyl substituted triazine compounds are bound to the aminoplast resins by carbon-oxygen carbon-carbamoyl nitrogen or carbon-, active methylene …
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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 November 20, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2020.
- 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.