Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4943365 | Method for the production of modified pitches and the further application | Winfried Boenigk, Maximilian Zander | 1990-07-24 |
| 4827050 | Method for separation of phenols and bases from coal tar oils by extraction | Siegfried Peter, Marc Seekamp, Herbert Beneke | 1989-05-02 |
| 4523016 | Process for the catalytic dehydrogenation of piperidine | Georg Grigoleit, Rudolf Oberkobusch, Kurt Matern | 1985-06-11 |
| 4430193 | Process for dissolving coal in hydrocarbon mixtures | Heinz-Gerhard Franck | 1984-02-07 |
| 4427526 | Process for the production of hydrogenated aromatic compounds and their use | Heinz-Gerhard Franck, Helmut Kohler | 1984-01-24 |
| 4415429 | Process for the preparation of highly aromatic pitchlike hydrocarbons | Heinz-Gerhard Franck, Helmut Kohler | 1983-11-15 |
| 4380454 | Coking quality of coals with insufficient coking properties | Heinz-Gerhard Franck, Karl-Heinz Koch, Rolf Marrett | 1983-04-19 |
| 4339328 | Process for the production of high grade carbonaceous binders | Heinz-Gerhard Franck, Helmut Kohler, Heinrich Louis | 1982-07-13 |
| 4259171 | Process for the separation of quinoline-insoluble components from coal tar pitch | Gerd Collin | 1981-03-31 |