Composition for dyeing keratinous fibers containing 3 amino pyrazolo- [1,5-a] pyridines, dyeing method, novel 3-amino pyrazolo-[1,5-a] pyridines
US6730789B1 · kind B1 · utility
219Cited by
20References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2002 |
| Grant date | May 4, 2004 |
| Priority date | — |
| Expiry date | Dec 17, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D471/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention concerns novel oxidative composition for dyeing keratinous fibres comprising at least a 3-amino-pyrazolo-[1,5-a]-pyridine of Formula (I), the dyeing method using said composition, novel 3-amino pyrazolo-[1,5-a]-pyridines, and the method for preparing them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.