Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6548452 | Weight material for drilling fluids and method of creating and maintaining the desired weight | Thomas G. Shumate | 2003-04-15 |
| 6180573 | Weight material for drilling fluids and method of creating and maintaining the desired weight | Thomas G. Shumate | 2001-01-30 |
| 6105674 | Composition and method for recovering lost circulation and sealing earth boreholes and cavities | W. Andrew Liao | 2000-08-22 |