Cationic azacyanine dyes and coloring agents containing said dyes
US7374583B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Apr 3, 2007 |
| Grant date | May 20, 2008 |
| Priority date | — |
| Expiry date | Apr 3, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B23/164
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to agents containing cationic azacyanine dyes having formula (I) for dyeing fibers, such as, for example, keratin fibers, wool, silk or fleeces, and in particular human hair, as well as to new asymmetrical azacyanine dyes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.