Indole-aldehyde hair dyes
US4932977A · kind A · utility
20Cited by
7References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 21, 1988 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Nov 21, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Combined indole-aldehyde compositions for dyeing natural fibers, particularly for coloring human hair, are taught wherein the combined indole-aldehyde composition is either preformed or reacted in site on the natural fiber under acidic conditions. A method employing said compositions is also taught.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.