Hair treatment methods
US8277519B2 · kind B2 · utility
0Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2009 |
| Grant date | Oct 2, 2012 |
| Priority date | — |
| Expiry date | Sep 10, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/882
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method of colouring a material, the method comprising the steps of: a)applying to the material a composition comprising a sulphur-containing nucleophile; and b)applying to the material a composition comprising a dye compound selected from a dye class other than the class of reactive dyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.