Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4288372 | Production of maleic anhydride | Raymond Higgins | 1981-09-08 |
| 4222945 | Production of maleic anhydride | Raymond Higgins | 1980-09-16 |
| 4209423 | Production of acid anhydrides and catalysts therefor | Raymond Higgins | 1980-06-24 |