Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4430163 | Process for the continuous separation of slightly volatile components from a crude phthalic acid anhydride | Manfred Albers, Gerhard Keunecke | 1984-02-07 |
| 4269776 | Jet pump exhaust recycle in production of phthalic anhydride | Gerhard Keunecke | 1981-05-26 |
| 4263211 | Process for the recovery of maleic anhydride from gases containing maleic anhydride | Gerhard Keunecke, Anton Klopfer, Lothar Sterck | 1981-04-21 |