Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812594 | Process for purification of crude p-hydroxymethylbenzoic acid | — | 1989-03-14 |
| 4500732 | Process for removal and recycle of p-toluic acid from terephthalic acid crystallizer solvent | Martin A. Zeitlin | 1985-02-19 |
| 4447645 | Process for purification of p-hydroxymethylbenzoic acid | John A. Donohue, James O. Knobloch, Steven A. Cerefice | 1984-05-08 |