Expired Canadian patentCanada
Hair treatment compositions
CA 2532012 C · Owner: Unilever Plc · Inventors: Cotterall, Janet; Chandra, Lalitesh; Tiwari, Laxmikant
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a rinse off hair treatment composition comprising a salt. The composition is for lengthening and straightening hair.
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 July 23, 2004 and granted January 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 23, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 23, 2004
GrantedJanuary 24, 2012
Term endedJuly 23, 2024
Patent numberCA 2532012 C
Classification (IPC)A61K8/19 +2 more
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.