Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10413498 | Agents for dyeing keratin fibers, containing at least one dimeric, dicationic azo dye and at least one anionic and/or cationic surfactant | Antje Gebert-Schwarzwaelder, Helmut Giesa | 2019-09-17 |
| 10406089 | Agents for dyeing keratin fibres, containing at least one dimeric, dicationic azo dye with special substitution pattern | Antje Gebert-Schwarzwaelder, Helmut Giesa | 2019-09-10 |
| 10251826 | Alkaline agent for lightening hair containing oxidants and special carboxylic acid esters | Antje Gebert-Schwarzwaelder, Helmut Giesa | 2019-04-09 |