Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5300201 | Photochlorination of phthalic anhydride | Karl W. Seper | 1994-04-05 |
| 5021168 | Process for the preparation and recovery of oxydiphthalic anhydrides | Joseph A. Pawlak, Willis T. Schwartz | 1991-06-04 |
| 4870194 | Process for the preparation and recovery of oxdiphthalic anhydrides | Joseph A. Pawlak, Willis T. Schwartz | 1989-09-26 |