Stabilization of high solids coatings with liquid compositions of triazine uv absorbers
CA 2037097 C · Owner: Waterman, Paul Sheldon · Inventors: Waterman, Paul Sheldon
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Polymers are stabilized against degradation by the addition of a liquid composition comprising an organic solvent and at least 40% by weight of a triaryl triazine of the formula (I):, wherein X Y, and Z are each the same or different aromatic carbocyclic radicals, and at least one of x Y, and Z is substituted by a hydroxy group ortho to the point of attachment to the triazine ring and at least, one of R1 to R9 is an alkoxy radical of the formula -O-(misted alkyl) substituted at a point para to the point of attachment to the triazine ring and the, remainder of R1 to R9 are selected from the group consisting of hydrogen, hydroxy, alkyl alkoxy, sulfonic, carboxy, halo, haloalkyl and acylamino; …
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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 February 26, 1991 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2013.
- 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.