Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4794202 | Process for separating halogen substituted toluene isomers | Hermann A. Zinnen | 1988-12-27 |
| 4717778 | Process for separating the minor isomers of dinitrotoluene | Hermann A. Zinnen | 1988-01-05 |
| 4714783 | Separation of nitrobenzaldehyde isomers | Hermann A. Zinnen | 1987-12-22 |
| 4642397 | Process for separating isomers of dinitrotoluene | Hermann A. Zinnen | 1987-02-10 |