Expired Canadian patentCanada
Hair styling composition
CA 2057442 C · Owner: Unilever Plc · Inventors: Gough, Anthony D.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hair styling composition for imparting body and/or stylability to hair, comprises, (a) at least one of surfactant conditioning agent, and water or other volatile solvent together, with, (b) a per-alk(en)yl hydrocarbon material.
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 December 10, 1991 and granted October 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 10, 1991
GrantedOctober 23, 2001
Term endedDecember 10, 2011
Patent numberCA 2057442 C
Classification (IPC)A61K8/41 +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.