7-nitro-2,1,3-benzoxadiazole and 7-nitro-2,1,3-benzthiadiazole derivatives, as well dyeing agents for keratin fibers containing these compounds
US7083656B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Jan 7, 2004 |
| Grant date | Aug 1, 2006 |
| Priority date | — |
| Expiry date | May 27, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D271/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The new 7-nitro-2,1,3-benzoxadiazole compounds and 7-nitro-2,1,3-benzthiadiazole compounds of formula (I) are:Dyeing agents for keratin fibers, containing the compounds of formula (I), and methods of dyeing hair with these dyeing agents are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.