Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5367096 | Process for the preparation of 2,5-di(phenylamino)terephthalic acid and dialkyl esters thereof in high purity | Eberhard Ritter, Hans-Ludwig Schafer, Thomas Vollheim | 1994-11-22 |