Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6946005 | Pyrrolidinyl-substituted para-phenylenediamine derivatives substituted with a cationic radical, and use of these derivatives for dyeing keratin fibers | Laure Ramos, Madeleine Leduc, Michel Philippe | 2005-09-20 |
| 6923835 | Bis-para-phenylenediamine derivatives comprising a pyrrolidyl group and use of these derivatives for dyeing keratin fibres | Laure Ramos, Madeleine Leduc | 2005-08-02 |