Hair coloring method and composition
US6783558B2 · kind B2 · utility
1Cited by
1References
15Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 14, 2002 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Sep 3, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/494
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention is directed to a hair coloring method by using a composition comprising a specified ring-fused heterocycle direct dyestuff having the general formula (1) or a salt thereof wherein the formulas are as defined in the patent claims. Furthermore, the present invention is also directed to the composition. This composition has a surprisingly good hair coloring performance and compatibility with peroxides. The use of this composition leads to long lasting brilliant colors wherein the color is stable against washing of the hair and environmental influences.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.