Dye composition comprising at least one direct dye of the azo-pyridinio-pyridone family and at least one different synthetic dye, and process
US7217299B2 · kind B2 · utility
0Cited by
15References
20Claims
0Family size
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Key dates
| Filing date | Jan 7, 2005 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Nov 11, 2025 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to a dye composition comprising, as direct dye, at least one dye of the azo-pyridinio-pyridone family and at least one synthetic dye different from the first dye.The invention also relates to a process for dyeing keratin fibers, e.g., human keratin fibers such as the hair, and to a multi-compartment device for implementing it.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.