Patent · US Expired

N-heteroarylmethyl-m-phenylenediamine derivatives-containing dyes for keratin fibers and novel n-heteroarylmethyl-m-phenylenediamine derivatives

US6997961B2 · kind B2 · utility

3Cited by

2References

15Claims

0Family size

Assignee

Wella GmbH · DE

Inventors

Laurent Chassot · Praroman, CH
Hans-Juergen Braun · Ueberstorf, CH

Key dates

Filing date	Oct 18, 2001
Grant date	Feb 14, 2006
Priority date	—
Expiry date	Dec 19, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D333/20
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Dyeing agents for keratin fibers, containing N-heteroarylmethyl-m-phenylenediamine derivatives of general formula (I) or the salts thereof and new N-heteroarylmethyl-m-phenylenediamine derivatives.

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