Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4297474 | Polyetherimides prepared by self-condensation of hydroxyaryl phthalimide salts | Frank John Williams | 1981-10-27 |
| 4247464 | Liquid extraction method for recovering aromatic bisimides | Frank John Williams | 1981-01-27 |
| 4210731 | Aromatic polyformal-polycarbonate block polymers and method for making same | Donald S. Johnson | 1980-07-01 |