Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5639896 | Process for the preparation of N,N'-disubstituted 1,4-diaminoanthraquinones | Dietmar Kalz, Reinold Schmitz, Karl-Heinz Reinhardt, Josef Schroder | 1997-06-17 |
| 5621027 | Dyestuffs for bulk dyeing plastics | Peter Roschger, Volker Hederich, Friedrich W. Krock | 1997-04-15 |