Poly-aminoacid derivatives and their use in compositions for treating keratinous fibres
CA 2324302 A1 · Owner: Philippe, Michel · Inventors: Blaise, Christian; Philippe, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns the use in a cosmetic composition of at least a poly-aminoacid of general formula (I) in which X is -O- -S- or -NR¿3?; R¿1? represents in particular a hydrogen atom or a C¿1?-C¿40? alkyl radical; R¿2? represents in particular a hydrogen atom or an optionally substituted alkyl radical; R¿3? represents a hydrogen atom or an alkyl radical; R¿4? represents a hydrogen atom or a radical such as NH¿2? OH, SH, -CHOHCH¿3?, -CONH¿2?; n is a number greater than 1 such that the poly-aminoacid derivative molecular weight ranges between 200 and 200000. The invention also concerns the use of said derivatives for keratinous fibre strengthening and care.
Read the whole patent
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 5, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 5, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 5, 2021.
- 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.