Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4472307 | Preparation of anilino azo carbazole dyestuffs prepared by diazotization by nitrosylsulphuric acid in acetic acid | Ulrich Buhler, Wolfgang Bodenstedt, Heinz Hanel, Horst Tappe | 1984-09-18 |