Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5919887 | Decoloration of polyisocyanates containing isocyanurate and diretdione groups | Hermann Graf, Ernst Deuker, Stefan Wolff, Ludwig Schuster, Richard Hardt | 1999-07-06 |