Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4285870 | Process for continuously separating phthalic anhydride from the reaction gases of the catalytic oxidation of o-xylene and/or naphthalene | Gerhard Keunecke, Lothar Sterck | 1981-08-25 |
| 4285871 | Process for continuously separating phthalic anhydride from the reaction gases of the catalytic oxidation of o-xylene and/or naphthalene | Gerhard Keunecke, Lothar Sterck | 1981-08-25 |
| 4263211 | Process for the recovery of maleic anhydride from gases containing maleic anhydride | Gerhard Keunecke, Herbert Krimphove, Lothar Sterck | 1981-04-21 |