Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4311521 | Membrane separation of catalyst metals from trimellitic acid production and separation of cobalt from manganese | Jon J. Harper | 1982-01-19 |
| 4309390 | Separation of cobalt and manganese from trimellitic acid process residue by extraction, pH adjustment, and magnet | Jon J. Harper | 1982-01-05 |