Heteroaromatic binuclear black direct dyes
US7288124B2 · kind B2 · utility
2Cited by
14References
45Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 2005 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | May 3, 2026 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/065
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Disclosed herein are novel heteroaromatic binuclear direct dyes, dye compositions containing these dyes and also a process for dyeing keratin fibers using them. In particular, the invention relates to heteroaromatic binuclear direct dyes comprising a pyridine nucleus.With these novel dyes, black shades that show good fastness can be obtained, and they also may show good stability in dye compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.