Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6008350 | Process for the production of cyanine dyes | Stephan Michaelis, Karin Hassenruck, Horst Berneth, Paul Callant | 1999-12-28 |
| 5948600 | Method and material for the formation of a heat mode image | Stephan Michaelis, Karin Hassenruck, Horst Berneth, Paul Callant, Herman Uytterhoeven +2 more | 1999-09-07 |
| 5874582 | Bulk dyeing using quinophthalone dyestuffs | Stephan Michaelis, Volker Hederich | 1999-02-23 |
| 5800573 | Bulk dyeing using quinophthalone dyestuffs | Stephan Michaelis, Volker Hederich | 1998-09-01 |
| 5626633 | Bulk dyeing of plastics | — | 1997-05-06 |
| 5621027 | Dyestuffs for bulk dyeing plastics | Volker Hederich, Stephan Michaelis, Friedrich W. Krock | 1997-04-15 |
| 5582621 | Bulk dyeing of plastics | Stephan Michaelis, Hauke Furstenwerth | 1996-12-10 |
| 5554731 | Process for the preparation of aminoazo dyes | Karl-Josef Herd | 1996-09-10 |
| 5530130 | Phthaloperinone dyestuffs | Volker Hederich, Stephan Michaelis | 1996-06-25 |
| 5525152 | Pigment salts and their use for dyeing and pigmenting | Stephan Michaelis, Gunther Franke, Bernd Woost, Bernd Kaletta | 1996-06-11 |
| 5466805 | Perinone dyestuffs for bulk dyeing of plastics | — | 1995-11-14 |
| 5432266 | Fiber-reactive monoazo and disazo dyes | Karl-Josef Herd | 1995-07-11 |
| 5342444 | Dyestuffs and their use for mass-coloration of plastics | Horst Harnisch | 1994-08-30 |