Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849203 | Sulfur recovery plant and process using oxygen | — | 1989-07-18 |
| 4822591 | Two-reactor, high-recovery sulfur plant and process | Robert L. Reed | 1989-04-18 |
| 4798716 | Sulfur recovery plant and process using oxygen | — | 1989-01-17 |