Dye compositions
US6565615B1 · kind B1 · utility
5Cited by
20References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1999 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | Feb 12, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/415
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A hair dye composition comprising a primary intermediate, a coupler and oxidant and water wherein the primary intermediate is a compound of the formula I or II with the proviso that when the primary intermediate has the formula II, the coupler has the formula III
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.