Patent · US Expired

Dyestuff for keratin fibers

US7320711B2 · kind B2 · utility

1Cited by

3References

8Claims

0Family size

Assignee

Wella GmbH · DE

Inventors

Juergen Schmenger · Weiterstadt, DE
Petra Braun · Munster, DE

Key dates

Filing date	May 3, 2004
Grant date	Jan 22, 2008
Priority date	—
Expiry date	Feb 16, 2025

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K2800/56
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

The colorant for keratin fibers contains direct and/or oxidative dyes as well as a perfume system consisting of an encapsulated perfume and an unencapsulated perfume of the same composition. The ratio of encapsulated perfume to unencapsulated perfume is equal to about 0.5:3 to 3:0.5. The perfume system is used for removing or masking the unpleasant odor of alkalinizing agents in the colorant.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.