Patent · US Active

Dyeing composition for keratin fibers comprising a direct dye and an organic alkalizing agent, method for dyeing; and kit-of-parts thereof

US12121605B2 · kind B2 · utility

0Cited by

0References

18Claims

0Family size

Assignee

KAO CORPORATION · JP

Inventors

Bernd Nöcker · Darmstadt, DE
Steven Breakspear · Darmstadt, DE
Fariba Ghiasi · Darmstadt, DE
Anna Neu · Darmstadt, DE
Masahiko Watanabe · Hitachi, JP
Fumina Abo · Sumida, JP

Key dates

Filing date	Sep 20, 2021
Grant date	Oct 22, 2024
Priority date	—
Expiry date	Oct 11, 2041

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K2800/4322
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

A dyeing composition for keratin fibers, including one or more direct dyes selected from HC Blue 18, HC Red 18, HC Yellow 16, and salts thereof, and tris-(hydroxymethyl)-aminomethane and salts thereof. A method for dyeing keratin fibers, including mixing the composition with a second aqueous composition having a pH in a range of 1 to 6 and optionally including one or more oxidizing agents to yield a ready-to-use composition having a pH in a range of 7 to 12, applying the ready-to-use composition onto the keratin fibers and leaving it for a time period in a range of 1 min to 60 min, and rinsing-off the keratin fibers and optionally shampooing the keratin fibers.

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