Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4499023 | Process for separating technically pure 2,4-diisocyanatotoluene or isomer mixtures having an increased content of 2,4-diisocyanatotoluene from isomer mixtures of 2,4- and 2,6-diisocyanatotoluene | Alexander Mitrowsky, Adolf Wissner | 1985-02-12 |
| 4300004 | Process for the preparation of dichlorobenzenes | Adolf Wissner, Feliks Bitners, Raimund Wambach | 1981-11-10 |