Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5696305 | Process for the production of nitroaromatic compounds | Thomas Schieb, Gerhard Wiechers, Jurgen Zimmermann | 1997-12-09 |
| 5689018 | Process for the production of dinitrotoluene | Thomas Schieb, Gerhard Wiechers, Jurgen Zimmermann | 1997-11-18 |
| 5679873 | Process for the production of dinitrotoluene | Thomas Schieb, Gerhard Wiechers, Jurgen Zimmermann | 1997-10-21 |
| 5663462 | Process for the production of dinitrotoluene and isomeric mixtures of dinitrotoluene | Thomas Schieb, Gerhard Wiechers | 1997-09-02 |
| 5616818 | Process for the polynitration of aromatic compounds | Hans-Georg Pirkl, Reinhard Schom acker, Thomas Schieb, Gerhard Wiechers, J urgen Zimmermann | 1997-04-01 |