Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11639458 | Drilling mud with enhanced activated sludge additive | Mark E. Zappi, Rafael Hernandez | 2023-05-02 |
| 10501674 | Enhanced activated sludge as drilling mud additive | Mark E. Zappi, Rafael Hernandez | 2019-12-10 |