Patent · US Active

Hair dyeing composition with improved durability

US12357550B2 · kind B2 · utility

0Cited by

1References

17Claims

0Family size

Assignee

KAO CORPORATION · JP

Inventors

Bernd Nöcker · Darmstadt, DE
Steven Breakspear · Darmstadt, DE
Fariba Ghiasi · Darmstadt, DE
Niu Jian · Darmstadt, DE

Key dates

Filing date	Sep 20, 2021
Grant date	Jul 15, 2025
Priority date	—
Expiry date	Oct 5, 2041

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K2800/884
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A dyeing composition for keratin fibers, including one or more first direct dyes selected from HC Blue 18, HC Red 18, HC Yellow 16, and salts thereof, one or more second direct dyes selected from Disperse Black 9, Acid Yellow 1, 2-amino-6-chloro-4-nitrophenol and salts thereof, and one or more alkalizing agents.

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