Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840910 | Controlling sulfide scavenger content of drilling fluid | Stephen D. Matza, Henry C. Fleming, III | 1989-06-20 |
| 4805708 | Controlling sulfide scavenger content of oil-based drilling fluid | Stephen D. Matza, Henry C. Fleming, III | 1989-02-21 |