Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4315864 | Preparation of maleic anhydride | Dennis E. Dria | 1982-02-16 |
| 4294722 | Preparation of vanadium phosphorus catalysts | Dennis E. Dria | 1981-10-13 |
| 4293443 | Oxidation catalysts | Dev D. Suresh, Robert K. Grasselli | 1981-10-06 |
| 4293498 | Preparation of maleic anhydride | Michael F. Lemanski, Ernest C. Milberger | 1981-10-06 |
| 4244879 | Preparation of maleic anhydride | Dennis E. Dria | 1981-01-13 |
| 4234461 | Oxidation catalysts | Dev D. Suresh, Robert K. Grasselli | 1980-11-18 |
| 4225465 | Production of maleic anhydride from four-carbon hydrocarbons using catalysts prepared by hydrothermal techniques | — | 1980-09-30 |
| 4219484 | Production of maleic anhydride from four-carbon hydrocarbons using catalysts prepared by water reflux techniques | Ernest C. Milberger, Serge R. Dolhyj | 1980-08-26 |
| 4218382 | Production of maleic anhydride from four-carbon hydrocarbons using catalysts prepared by water reflux techniques | Ernest C. Milberger, Serge R. Dolhyj | 1980-08-19 |