Triazinylaminostilbene derivative as fluorescent whitening agents
CA 2382002 A1 · Owner: Hauger, Serge · Inventors: Cuesta, Fabienne; Grienenberger, Marc Roger; Metzger, Georges
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to compounds having formula (1): wherein each R1 represents, independently, a linear C1-C4-alkylene residue which is unsubstituted or substituted by hydroxy C1-C4-alkyl, C1-C4-alkoxy, C1-C4-, hydroxy- or alkoxy-alkoxy -OCOM, -OCOC1-C4-alkyl, or an amino acid residue from which a hydrogen atom on the amino group has been removed; each R2 represents, independently, a linear C1-C4-alkylene residue which is unsubstituted or substituted by hydroxy C1-C4-alkyl, C1-C4-alkoxy, C1-C4-, hydroxy- or alkoxy-alkoxy -OCOM, -OCOC1-C4-alkyl, -CO2M, CO2C1-C4-alkyl SO3M or phenoxy which is unsubstituted or substituted by halogen C1-C4-alkyl or C1-, C4-alkoxy, -CO2M or …
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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 September 4, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 4, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 4, 2022.
- 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.