Cationic naphthyldiazo dyes and keratin fibers-coloring agents containing these dyes
US7517367B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Dec 13, 2004 |
| Grant date | Apr 14, 2009 |
| Priority date | — |
| Expiry date | Nov 27, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B44/06
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Cationic naphthyldiazo dyes of general formula (I)and colorants for keratin fibers containing these dyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.