Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5259932 | Heating system for regenerative coke ovens | Manfred Blase, Ulrich Kochanski, Dietrich Wagener, Heinz Durselen, Dieter Stalherm +3 more | 1993-11-09 |
| 4673751 | Method of preparing 3,4-dihydro-alpha-pyrones | Klaus-Dieter Steffen | 1987-06-16 |
| 4558825 | Agitator mill | Willy John, Norbert Klimaschka, Arno Wagner | 1985-12-17 |
| 4327230 | Method for the continuous preparation of alcoholates | Otto Ackermann, Hans Leuck, Gerhard Schmeling | 1982-04-27 |
| 4322554 | Polymeric azomethines | Hans-Joachim Herrmann, Klaus-Dieter Steffen | 1982-03-30 |
| 4306228 | Security alarm system monitoring difference between sound signal components in two frequency ranges | — | 1981-12-15 |
| 4297502 | Aromatic bisazomethines, a method for their preparation, and their use as reactive pigments | Hans-Joachim Herrmann, Klaus-Dieter Steffen | 1981-10-27 |
| 4289895 | Method for the preparation of oligomeric alkylene terephthalates | Rudolf Burkhardt, Reinhard Schmidt, Klaus Thewalt | 1981-09-15 |