Composition for dyeing human keratin fibres, comprising a particular monocationic monoazo dye
US6824570B2 · kind B2 · utility
23Cited by
13References
56Claims
0Family size
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Key dates
| Filing date | Sep 26, 2002 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | May 23, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A dye composition for dyeing human keratin fibers, such as hair, comprising at least one monocationic monoazo dye of formula (I)W1—W2—N═N—W3,a dyeing process using the composition and certain novel compounds of formula (I).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.