Novel para-phenylenediamine dyes for keratin fibres
US4149848A · kind A · utility
7Cited by
2References
20Claims
0Family size
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Key dates
| Filing date | Jun 5, 1978 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Jun 5, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Compositions for dyeing keratin fibres are provided based on a novel para-phenylenediamine oxidative dye which has the formula: ##STR1## in which R represents hydrogen, chlorine or methyl or a salt thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.