Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4456777 | Process for the preparation of 2-chloro-4-nitrotoluene | Gerd-Michael Petruck, Adolf Wissner | 1984-06-26 |
| 4453020 | Process for purifying the methanol employed in the preparation of formaldehyde | Kurt Klinkmann | 1984-06-05 |
| 4409407 | Process for the preparation of 1,3,5-trichlorobenzene | Gerd-Michael Petruck | 1983-10-11 |