Meta-phenylenediamines
US4420637A · kind A · utility
16Cited by
3References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1979 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | Jul 2, 1999 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K8/411
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
New-meta-phenylenediamines are described for use in dyeing keratin fibres, especially human hair. These have the general formula: ##STR1## in which R represents an alkyl radical containing from 1 to 4 carbon atoms and n is an integer of from 1 to 3, or an acid salt thereof from 1 to 3 and include their acid salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.