Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › 2,5-diaminopyridine oxidation bases for the dyeing of keratin fibres

2,5-diaminopyridine oxidation bases for the dyeing of keratin fibres

US Patent 6837908 · Granted Jan 4, 2005

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Composition for dyeing the hair, comprising a heterocyclic oxidation base and a 2023
Oxidation base derived from 1-hexyl-4,5-diaminopyrazole, composition containing 2023
Symmetric azomethine direct dyes, process for their preparation, cosmetic compos2022
Use of dihydroisoquinolinium double derivatives for treating keratin materials, 2022
Use of dihydroisoquinolinium salts for treating keratin materials, compositions 2022
Composition for dyeing the hair, comprising an oxidation base of para-phenylened2022
Composition for dyeing the hair, comprising an oxidation base, a 2-amino-5-ethyl2022
Use for dyeing keratin fibers of a compound of azomethine type bearing a quinoli2021
Use of substituted dihydroisoquinolinium salts for treating keratin materials, c2021
Process for dyeing keratin fibres using at least one particular triarylmethane d2021
Dissymmetric azomethine direct dyes and process for their preparation, cosmetic 2021
Azomethine direct dyes bearing at least one cationic charge, cosmetic compositio2021