Use of dyestuffs for dyeing keratin fibers and compositions comprising the dyestuffs
US8579993B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Dec 23, 2011 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Dec 23, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/4324
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Present invention relates to the use of a cationic anthrachinone dye for coloring keratin fibers, especially human hair, and compositions comprising the said dyestuffs. The object of the present invention is the use of dyestuff according to general structurewherein R1 is a group selected from CH3, CH2OH, C2H2OH, C4H9, C3H6OC2H5, C2H4OCH3 and C3H6OC2H4OCH3 for dyeing keratin fibers especially human hair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.