Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4721805 | Preparation of acyloxy benzene sulfonate | — | 1988-01-26 |
| 4692279 | Preparation of acyloxy benzene sulfonate | — | 1987-09-08 |
| 4390474 | Sulfonation petroleum composition | Edward A. Knaggs | 1983-06-28 |
| 4252192 | Process for enhanced oil recovery employing petroleum sulfonates | Edward A. Knaggs | 1981-02-24 |