Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Secondary para-phenylenediamines having a carboxyl group, dye compositions comprising the same, and dyeing processes using the compositions

Secondary para-phenylenediamines having a carboxyl group, dye compositions comprising the same, and dyeing processes using the compositions

US Patent 7384432 · Granted Jun 10, 2008

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Process for dyeing keratin fibers using a direct dye and a saccharinate salt and2025
Process for dyeing keratin materials using a direct dye and an aliphatic ammoniu2023
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
Use for dyeing keratin fibers of a compound of azomethine type bearing a quinoli2021
Use of substituted dihydroisoquinolinium salts for treating keratin materials, c2021
Dissymmetric azomethine direct dyes and process for their preparation, cosmetic 2021
Azomethine direct dyes bearing at least one cationic charge, cosmetic compositio2021
Use of particular pyridinium salts for the treatment of keratin substances, comp2020
(Dis)symmetric azomethine-type direct dye comprising at least one pyrazolopyridi2020
Dye composition using at least one coupler of meta-phenylenediamine type substit2019