Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8097558 | Catalyst and method for producing phthalic anhydride | Marvin Estenfelder, Christian Guckel | 2012-01-17 |
| 7618918 | Catalyst and method for preparing phthalic anhydride | Marvin Estenfelder, Christian Guckel | 2009-11-17 |