Triazine compounds containing 2,2,6,6-tetramethyl-4-piperidyl groups as stabilizers for organic materials
CA 2225487 A1 · Owner: Ciba Specialty Chemicals Holding Inc. · Inventors: Guizzardi, Fabrizio; Lazzari, Dario
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A product of the formula (I), (I), in which n is a number from 2 to 14; the radicals R1 are for example hydrogen or C1-C8alkyl; R2 is for example C2-C12alkylene; the radicals A are for example C1-C8acyl; the radicals B are independently of one another -OR3, -N(R4)(R5) or a group of the formula , ;, R3, R4 and R5, which are identical or different are for example hydrogen or C1-C18alkyl or-N(R4)(R5) is additionally a group of the formula with Y being -O-, -CH2-, -CH2CH2- or >N-CH3; X is -O- or >N-R6; R6 is for example hydrogen or C1-C18alkyl; R is preferably a group of the formula , ; with the proviso that in the individual recurrent units of the formula (I), each of the radicals B R, R1 and …
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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 December 22, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 22, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2019.
- 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
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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.