Colouring keratinous material
CA 1290105 C · Owner: Taylor, Rosemary Margaret · Inventors: Taylor, Rosemary Margaret; Fridd, Petrina Felicity
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The specification discloses a process for colouring hair in which certain polysiloxanes including siloxane units having a silicon bonded hydroxy group are employed to provide improved depth of colour or colour retention. Preferably the polysiloxanes are employed as a treatment on hair prior to or after application of colorant.
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
- Granted October 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2008.
- 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.