Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6737386 | Aqueous based zirconium (IV) crosslinked guar fracturing fluid and a method of making and use therefor | Lester E. Matthews | 2004-05-18 |
| 6251838 | Suspended delayed borate cross-linker | Gong Chen | 2001-06-26 |
| 6225264 | Suspended delayed borate cross-linker | Gong Chen | 2001-05-01 |
| 5697444 | Carboxyalkyl substituted polygalactomannan fracturing fluids | Ian W. Cottrell | 1997-12-16 |
| 5614475 | Carboxyalkyl substituted polygalactomannan fracturing fluids | Ian W. Cottrell | 1997-03-25 |
| 4993819 | External gunsight eyepiece attachment | — | 1991-02-19 |
| 4238255 | Use of either regular or low-calcium heteropolysaccharide S-7 in explosives and compositions thereby produced | Jaewon L. Shim | 1980-12-09 |