Hair dye composition
US7651538B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 10, 2006 |
| Grant date | Jan 26, 2010 |
| Priority date | — |
| Expiry date | Mar 20, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/4322
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A hair dye composition containing an azo dye (1) or a salt thereof,(wherein R1 to R4 represents H, aliphatic hydrocarbon group, aryl group, halogen atom, acyl group, cyano group, acylamino group, or the like, wherein R1 and R2, and/or R3 and R4 may be coupled to form a 5- or 6-membered ring; X represents C or N, with the proviso that when X represents C, n stands for 1, and when X represents N, n stands for 0; A1, A2, A3 and A4 each represents N or represents C substituted by Y or having H, with the proviso that at least one of A1, A2, A3 and A4 is a nitrogen atom; and Y represents a substituent with the proviso that m stands for an integer from 0 to 3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.