Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886880 | Process for the preparation of triphendioxazines | Holger Hahn | 1989-12-12 |
| 4784805 | Process for the preparation of anthraquinoid intermediates and vat dyes | — | 1988-11-15 |
| 4701281 | Process for the preparation of anthraquinone imides | — | 1987-10-20 |
| 4692278 | Process for the preparation of 1,4-diaminoanthraquinones | — | 1987-09-08 |
| 4551283 | Process for isolating 2-naphthylamine-3,6,8-trisulfonic acid in the form of the monopotassium or monoammonium salt | — | 1985-11-05 |