Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870194 | Process for the preparation and recovery of oxdiphthalic anhydrides | Joseph A. Pawlak, Willis T. Schwartz | 1989-09-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870194 | Process for the preparation and recovery of oxdiphthalic anhydrides | Joseph A. Pawlak, Willis T. Schwartz | 1989-09-26 |