Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10982156 | Method for producing naphthenic process oils by hydrogenation | — | 2021-04-20 |
| 10273419 | Method for producing naphthenic process oils by hydrogenation | — | 2019-04-30 |
| 9371495 | Process for the production of naphthenic process oils by hydrogenation | — | 2016-06-21 |
| 6872257 | Pressurized chamber doctor blade | Bernd Martens, Sadan Deral, Wolfram Szczepaniak | 2005-03-29 |
| 5091007 | Naphthenic-aromatic hydrocarbon compositions | — | 1992-02-25 |