Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861738 | Process for regenerating and stabilizing phosphorus-vanadium-oxygen complex catalysts | — | 1989-08-29 |
| 4845241 | Process for the manufacture of maleic | William S. Eryman | 1989-07-04 |
| 4824819 | Vanadium coated phosphorus-vandium oxide and phosphorus-vanadium oxide co-metal catalyst and process for the manufacture of maleic anhydride | William S. Eryman | 1989-04-25 |
| 4810803 | Process for improving phosphorus-vanadium oxide and phosphorus vanadium-co-metal oxide catalysts in the oxidation of -butane to maleic anhydride | — | 1989-03-07 |