Composition and process for the dyeing of hair
CA 1196576 A · Owner: Bristol-Myers Squibb Company · Inventors: Hnatchenko, Michael; Moses, Charles; Pohl, Stanley H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Process and composition for dyeing hair and leaving it in a durably conditioned form, wherein a cationic polymer product (as defined), a water-soluble anionic surfactant and an organic solvent for the reactionn product of the cationic polymer product and the anionic surfactant and a carefully measured amount of water are included along with a hair dyeing intermediate.
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 November 12, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 2002.
- 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.