Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4961827 | Obtaining very pure maleic anhydride from crude maleic anhydride | Johannes E. Schmidt, Rolf Seubert, Karl Fischer, Friedrich Sauer | 1990-10-09 |
| 4561942 | Isolation of methyl 4-pentenoate from mixtures containing this and methyl 3-pentenoate | Heinz-Walter Schneider, Rudolf Kummer | 1985-12-31 |