Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859372 | Process for the sulphonation of aromatic compounds with sulphur trioxide | Horst Behre, Wilfried Kohler, Nikolaus Muller, Peter Schnegg | 1989-08-22 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859372 | Process for the sulphonation of aromatic compounds with sulphur trioxide | Horst Behre, Wilfried Kohler, Nikolaus Muller, Peter Schnegg | 1989-08-22 |