Substituted benzyl derivatives of polyalkylene-polyamines and their use in cosmetic and pharmaceutical compositions
CA 2208581 A1 · Owner: L'Oreal · Inventors: Galey, Jean-Baptiste
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Substituted benzyl derivatives of polyalkylene-polyamines having the following formula (see fig I) where: n and m = 2, 3 or 4; p=2 or 3; x=0 1 or 2; R1 and R4, either identical or different represent (i) a straight or branched alkyl radical at C1-C4 or (ii) a radical with the following formula (see fig II): Z1 represents OH or OR; Z2 and Z3 represent H OH or OR, R being a straight or branched alkyl radical at C1-C8; R2 and R3 either identical or different, represent H a straight or branched alkyl radical at C1-C4 a radical of formula (A), or a radical of formula (B) as follows (see Fig. III): R'1 R'4 and R'5 represent H, a straight or branched alkyl radical at C1-C4 or a radical of formula …
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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 June 17, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 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.