Composition for the dyeing of human hair
US6733541B2 · kind B2 · utility
3Cited by
0References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 13, 2002 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Jun 10, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/44
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention concerns a composition for the dyeing of human hair on the basis of at least one direct-acting hair dyestuff, characterized in that it comprises at least one dyestuff of the formula (1) wherein R1 is a halogen atom; R2 and R4 are an optionally OH— or NH2-substituted C1-C4-alkyl group or phenyl group and R3 stands for H, or an optionally OH— or NH2-substituted C1-C4-alkyl group or phenyl group.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.