Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6277783 | Method for the purification of acetaminophen | Olan S. Fruchey, Edward G. Zey | 2001-08-21 |
| 5981799 | Method for the purification of acetaminophen | Olan S. Fruchey, Edward G. Zey | 1999-11-09 |
| 5271811 | Process for purifying 2-(4-isobutylphenyl)-propionic acid by vacuum distillation | Siegbert Rittner, Adolf Schmidt, Gary L. Moss, Edward G. Zey | 1993-12-21 |