Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4675420 | Generation of reduced pressure in apparatuses in the preparation of phthalic anhydride and maleic anhydride | Ulrich Block, Klaus Nixdorf, Joachim Wagner | 1987-06-23 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4675420 | Generation of reduced pressure in apparatuses in the preparation of phthalic anhydride and maleic anhydride | Ulrich Block, Klaus Nixdorf, Joachim Wagner | 1987-06-23 |