Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7560418 | Additives for imparting fragile progressive gel structure and controlled temporary viscosity to oil based drilling fluids | William Walter Shumway | 2009-07-14 |
| 7550411 | Subterranean treatment fluids comprising polyoxazoline compositions and methods of use in subterranean formations | — | 2009-06-23 |
| 7178610 | Subterranean treatment fluids comprising polyoxazoline compositions and methods of use in subterranean formations | — | 2007-02-20 |