Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871484 | Process for the preparation of 2,2-bis-chloro-methylalkanecarboxylic acid chlorides | Manfred Jautelat, Dieter Arlt | 1989-10-03 |
| 4851596 | Process for nucleus-chlorination of aromatic hydrocarbons | Franz-Josef Mais, Kai Rohlk, Karlfried Wedemeyer | 1989-07-25 |
| 4827057 | Process for preparing 1,2-dichlorobenzene | Josef Kasbauer, Herbert Schmidt, Karlfried Wedemeyer | 1989-05-02 |
| 4827058 | Process for the removal of m-chlorotoluene from chlorotoluene mixtures | Franz-Josef Mais | 1989-05-02 |
| 4824975 | Process for the preparation of oxetane-3-carboxylic acids | Manfred Jautelat, Dieter Arlt | 1989-04-25 |
| 4820871 | Process for the preparation of N,N-diaryl-ureas | Wolfram Kissener, Joachim Franke, Karlfried Wedemeyer | 1989-04-11 |