Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876386 | Process for the oxidation of di- or trimethylbenzenes in the presence of cobalt and manganese from oxidation residue incinerator ash | Juergen K. Holzhauer, Dennis J. Michalak | 1989-10-24 |
| 4845274 | Oxidation of polyalkylaromatics | Michael R. Green | 1989-07-04 |
| 4845275 | Trimellitic acid process | Michael R. Green | 1989-07-04 |
| 4797497 | Trimellitic anhydride purification process | — | 1989-01-10 |