Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859372 | Process for the sulphonation of aromatic compounds with sulphur trioxide | Horst Behre, Heinz U. Blnak, Wilfried Kohler, Peter Schnegg | 1989-08-22 |
| 4804655 | Pesticidal cyclic malonylphosphonic diamides | Gerhard Bonse, Peter Andrews, Wilhelm Stendel, Robert Steffens | 1989-02-14 |