Composition based on quinone dyestuffs for use in hair dyeing and process for the preservation of quinone dyestuffs
US5259849A · kind A · utility
33Cited by
10References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1992 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | Jun 10, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/065
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to compositions, which are stable on storage, of certain benzoquinone and naphthoquinone dyestuffs in an anhydrous solvent containing a non-ionic surface-active agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.