Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873372 | Isolation of 4,4'-dichlorodiphenyl sulfone | Heinz Eilingsfeld, Peter Neumann, Michael Stumpp | 1989-10-10 |
| 4871876 | Preparation of 4,4' dichlorodiphenyl sulfone | Peter Neumann | 1989-10-03 |