2-(benzotriazol-2-yl)-4-alkyl-6-(2-hydroxy-3-benzoylbenzyl) phenols and stabilized compositions
CA 2116921 A1 · Owner: Falk, Robert A. · Inventors: Falk, Robert A.; Coughlin, Gregory R.; Luzzi, John J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, 2-(Benzotriazol-2-yl)-4-alkyl-6-(2-hydroxy-3-benzoyl-benzyl)phenols are prepared by reacting a Mannich base of a 2-(2-hydroxy-5-alkylphenyl)-2H-benzotriazole with a2-hydroxy-benzophenone. The hybrid products exhibit outstanding efficacy in protecting organic substrates from light-induced deterioration as well as good resistance to loss by volatilization or exudation during the processing of stabilized compositions at elevated temperatures.
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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 March 3, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 3, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2016.
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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.