Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4582591 | Process for the separation of resinous substances from coal-base heavy oils and use of the fraction obtained | Heinrich Hoermeyer, Juergen Stadelhofer, Wolfgang Brueggemann | 1986-04-15 |
| 4339328 | Process for the production of high grade carbonaceous binders | Jurgen Stadelhofer, Heinz-Gerhard Franck, Helmut Kohler | 1982-07-13 |
| 4304606 | Plasticized coal tar pitch, composition containing same and its use | Helmut Kohler, Rudolf Oberkobusch, Gerd Collin, Volker Potschka | 1981-12-08 |