Method for forming a catalyzed dye system
US11160738B2 · kind B2 · utility
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4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2019 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Mar 26, 2039 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/805
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to a method for forming a catalyzed dye system. The method includes the successive steps of (1) forming a mixture comprising at least one dye precursor and a catalyst and (2) adding an alkalizer to the mixture, which forms a catalyzed dye system. The dye system may be exposed to hair for less time than standard oxidative dye systems, which is believed to result in reduced damage to hair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.