Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6133480 | Preparation of N-phenyl-1-naphthylamine | Horst Behre, Helmut Fiege, Wolfgang Eymann, Rudolf Wiemers, Alexander Klausener | 2000-10-17 |
| 6054618 | Preparation of N-phenyl-1-naphthylamine | Hanspeter Baumgartner, Lutz Frohn, Alexander Klausener | 2000-04-25 |
| 5602284 | Process for separating off aminobiphenyl from diphenylamine | Hans-Josef Buysch, Rudolf Wiemers | 1997-02-11 |
| 4526705 | Light-collecting systems and the use of coumarin derivatives as energy converters in them | Uwe Claussen, Horst Harnisch, Carl-Wolfgang Schellhammer | 1985-07-02 |