Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8895481 | Viscoelastic surfactant acid treatment | Yiyan Chen, Abbas Mahdi, Matt Graham, Timothy L. Pope | 2014-11-25 |
| 8146416 | Methods and apparatus to perform stress testing of geological formations | Vincent Jeffrey Pisio, Edward Harrigan, John Edwards, Paul R. Howard, Koksal Cig +1 more | 2012-04-03 |
| 7741252 | Surfactants not toxic to bacteria | Yiyan Chen, Carlos Abad | 2010-06-22 |
| 7207388 | Non-Damaging Fluid-Loss Pill and Method of Using the Same | Mathew M. Samuel, Zhijun Xiao | 2007-04-24 |