Canadian application, no grantCanada
Use of carboxyl-containing polysiloxanes in cosmetic formulations
CA 2215131 A1 · Owner: Greif, Norbert · Inventors: Hossel, Peter; Greif, Norbert; Kneip, Michael
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carboxyl-containing polysiloxanes are used in cosmetic formulations, especially in haircare and skincare compositions.
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 September 24, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 24, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 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.
FiledSeptember 24, 1997
GrantedNo grant recorded
Term endedSeptember 24, 2017
Patent numberCA 2215131 A1
Classification (IPC)A61K8/89
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.