Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11591506 | Method for making and using a drilling fluid | Carl Keith Smith | 2023-02-28 |
| 10876027 | Method for making and using a drilling fluid | Carl Keith Smith | 2020-12-29 |
| 10738229 | Drilling fluid and method for drilling in coal-containing formations | Carl Keith Smith | 2020-08-11 |
| 8387723 | Drilling fluid and method for drilling in coal-containing formations | Carl Keith Smith | 2013-03-05 |
| 8338340 | Drilling fluid and methods | Carl Keith Smith | 2012-12-25 |
| 7989399 | Drilling fluid and methods | Carl Keith Smith | 2011-08-02 |