Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4937345 | Process for the preparation of 2-(arylamino)-3-carboxy-9(10H)-acridones | Erwin Dietz, Frank Prokschy | 1990-06-26 |
| 4935502 | Diazo compounds, a process for their preparation and their use as colorants | Rudolf Kuhne | 1990-06-19 |
| 4870164 | Symmetrical and asymmetrical disazo compounds having a bis-aryloxy alkane bridge | Rudolf Kuhne | 1989-09-26 |
| 4231964 | Nitroamines, processes for their manufacture and their use as diazo components | Rudolf Kuhne | 1980-11-04 |