Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851107 | Process for the hydrogenation of heavy and residual oils | Klaus Kretschmar, Ludwig Merz, Jose Guitian, Julio Krasuk, Franzo Marruffo | 1989-07-25 |
| 4836475 | Safety system on track guidance lines | Hubertus Christ, Herbert Mehren | 1989-06-06 |
| 4810365 | Hydrogenation of mineral oils contaminated with chlorinated hydrocarbons | Werner Dohler, Rolf Holighaus | 1989-03-07 |