Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7354572 | Method of dyeing keratin-containing fibres | — | 2008-04-08 |
| 7189268 | Method of dyeing keratin-containing fibres | — | 2007-03-13 |
| 7078498 | Method of coloring hair using cationic dyes | Beate Fröhling | 2006-07-18 |
| 7060806 | Cationic azo dye compound | — | 2006-06-13 |
| 6843256 | Method of coloring hair using cationic dyes | — | 2005-01-18 |
| 6762287 | Cationic imidazole azo dyes | — | 2004-07-13 |
| 5888252 | Processes for dyeing keratin-containing fibres with cationicazo dyes | — | 1999-03-30 |
| 5733343 | Process for dyeing keratin-containing fibres with cationic dyes | — | 1998-03-31 |
| 5708151 | Cationic imidazole azo dyes | — | 1998-01-13 |
| 5254522 | Pressure-sensitive or heat-sensitive recording material | Rudolf Zink, Peter Rohringer | 1993-10-19 |
| 4883866 | Methine-azo compounds containing cyclic cationic ammonium groups | — | 1989-11-28 |
| 4847364 | Methine-azo compounds containing cyclic cationic ammonium groups and open-chain coupling components | — | 1989-07-11 |
| 4754021 | Methine-azo compounds containing cyclic ammonium groups | — | 1988-06-28 |
| 4744179 | Process for controlling tool infeed at machining start of a gear cutting machine | — | 1988-05-17 |
| 4654384 | Basic water-soluble bis-(.beta.-azo-.alpha.-naphtholamino)-triazine compounds | Visvanathan Ramanathan | 1987-03-31 |
| 4634779 | Cyanogenation of benzopyrones and naphthopyrones | — | 1987-01-06 |
| 4609738 | Novel dyes, their production and their use | — | 1986-09-02 |
| 4550171 | 2-(Oxo, or thio)-3-substituted 1,3-benzothiazolyl-4-cyano-7-substituted amino-benzopyrans | — | 1985-10-29 |
| 4547579 | Substituted benzopyran compounds | — | 1985-10-15 |
| 4510088 | Dye mixtures of anthraquinone dyes | — | 1985-04-09 |
| 4385900 | Transfer printing supports and dyes for their manufacture: fluoroalkoxy anthraquinone dye | — | 1983-05-31 |