Issued Patents All Time
Showing 26–50 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7775282 | Methods of limiting leak off and damage in hydraulic fractures | Marie Noelle Dessinges, Carlos Abad, Erik Nelson | 2010-08-17 |
| 7398829 | Methods of limiting leak off and damage in hydraulic fractures | Marie Noelle Dessinges, Carlos Abad, Erik Nelson | 2008-07-15 |
| 7337839 | Fluid loss additive for enhanced fracture clean-up | Joseph Ayoub | 2008-03-04 |
| 7287593 | Methods of fracturing formations using quaternary amine salts as viscosifiers | Laura Schafer | 2007-10-30 |
| 6881709 | Viscosity reduction of viscoelastic surfactant based fluids | Erik Nelson, Bernhard Lungwitz, Keith Ingram Dismuke, Mathew M. Samuel, Golchi Salamat +6 more | 2005-04-19 |
| 6613720 | Delayed blending of additives in well treatment fluids | Jean-Pierre Feraud, Michael D. Parris, Stanley B. McConnell, Erik Nelson, Keith Ingram Dismuke | 2003-09-02 |
| 6011075 | Enhancing gel strength | Michael D. Parris | 2000-01-04 |
| 5957203 | Ultra-high temperature stable gels | Hoai T. Dovan, Burton B. Sandiford | 1999-09-28 |
| 5762141 | Ultra-high temperature stable gels | Hoai T. Dovan, Burton B. Sandiford | 1998-06-09 |
| 5617920 | Method for modifying gelation time of organically crosslinked, aqueous gels | Hoai T. Dovan, Burton B. Sandiford | 1997-04-08 |
| 5486312 | High temperature stable gels | Burton B. Sandiford, Hoai T. Dovan | 1996-01-23 |
| 5418217 | Composition for selectively reducing subterranean formation permeability | Hoai T. Dovan | 1995-05-23 |
| 5335733 | Method for delaying gelation of a gelable polymer composition injected into a subterranean formation | Burton B. Sandiford, Hoai T. Dovan | 1994-08-09 |
| 5291949 | Method for inhibiting caustic flood breakthrough | Hoai T. Dovan | 1994-03-08 |
| 5268112 | Gel-forming composition | Burton B. Sandiford, Hoai T. Dovan | 1993-12-07 |
| 5263540 | Crosslinked hydroxyethylcellulose and its uses | Hoai T. Dovan | 1993-11-23 |
| 5247993 | Enhanced imbibition oil recovery process | A. M. Sam Sarem, Shlomo Frieman | 1993-09-28 |
| 5246073 | High temperature stable gels | Burton B. Sandiford, Hoai T. Dovan | 1993-09-21 |
| 5246860 | Tracer chemicals for use in monitoring subterranean fluids | Dennis L. Saunders | 1993-09-21 |
| 5244042 | Lanthanide-crosslinked polymers for subterranean injection | Hoai T. Dovan | 1993-09-14 |
| 5226480 | Recovery system containing lanthanide-crosslinked polymers | Hoai T. Dovan | 1993-07-13 |
| 5225090 | Visible gels prepared using stainless steel as a crosslinking agent | Hoai T. Dovan | 1993-07-06 |
| 5211858 | Lanthanide-crosslinked polymers for subterranean fluid containment | Hoai T. Dovan | 1993-05-18 |
| 5207934 | Crosslinked hydroxyethylcellulose and its uses | Hoai T. Dovan | 1993-05-04 |
| 5203834 | Foamed gels having selective permeability | Burton B. Sandiford, Hoai T. Dovan | 1993-04-20 |