Method and composition for the gradual permanent coloring of hair
US6736861B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2002 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Jul 19, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/10
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method for permanently dyeing hair which comprises subjecting said hair to a number of treatments, having a set time interval between each two consecutive such treatments, wherein each treatment comprises steps a.) and b.) below:a.) contacting said hair, for a period of about 5 seconds to about 5 minutes with a recently made mixture of:i.) an alkaline composition comprising a dye intermediate in a shampoo base or in a conditioner base; andii.) an acidic composition comprising an oxidating compound in a shampoo base or in a conditioner base;b.) rinsing said mixture from said hair with water;with the proviso that when a conditioner base is present in a.) i.) above, an independently selected conditioner base is also present in a.) ii.) above; and when a shampoo base is present in a.) i.) above, an independently selected shampoo base is also present in a.) ii.) above;and wherein said number of treatments is between about 2 to about 30; and wherein said set time interval between each two consecutive treatments is between about 8 hours and 30 days, is described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.