Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4954331 | Sulfur recovery process using metal oxide absorbent | Paul T. Pendergraft | 1990-09-04 |
| 4913637 | Sulfur recovery system | — | 1990-04-03 |
| 4849202 | Sulfur recovery process using metal oxide absorbent with reducing gas purge | — | 1989-07-18 |
| 4797268 | Sulfur recovery process using metal oxide absorbent with regenerator recycle to Claus catalytic reactor | John J. McGovern, Paul T. Pendergraft | 1989-01-10 |
| 4793976 | Sulfur recovery system | — | 1988-12-27 |
| 4533529 | Sulfur recovery process | — | 1985-08-06 |