Oxidative hair dye compositions
US3970423A · kind A · utility
17Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1975 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | Feb 6, 1995 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P1/32
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Oxidative hair dye composition containing as "para component" compounds of the formula: ##SPC1## Or their acid addition salts, in which: PA1 R.sub.1 is alkyl or hydroxyalkyl; PA1 R.sub.2 is hydrogen or hydroxyalkyl; PA1 R.sub.3 is hydrogen, alkyl, alkoxy or halogen; and PA1 R.sub.4 occupies any one of the remaining positions on the benzene radical and is hydrogen, alkyl, alkoxy or halogen; providing that R.sub.2 is hydrogen when R.sub.3 is alkyl, alkoxy or halogen and providing that at least two of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 are other than hydrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.