Issued Patents All Time
Showing 26–50 of 66 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8691736 | Swellable polymer with cationic sites | James H. Hedges, David R. Zornes, Riley B. Needham, Huili Guan, Jenn-Tai Liang +4 more | 2014-04-08 |
| 8669214 | Swellable polymer with anionic sites | James H. Hedges, David R. Zornes, Riley B. Needham, Huili Guan, Jenn-Tai Liang +4 more | 2014-03-11 |
| 8648018 | Crosslinked swellable polymer | David R. Zornes, Riley B. Needham, James H. Hedges, Everett L. Johnston, Faye L. Scully | 2014-02-11 |
| 8389446 | Swellable polymers with hydrophobic groups | James H. Hedges, David R. Zornes, Riley B. Needham, Huili Guan, Jenn-Tai Liang +4 more | 2013-03-05 |
| 6387986 | Compositions and processes for oil field applications | Kari Daasvatn, Aly-Anis Hamouda | 2002-05-14 |
| 6051670 | Compositions and processes for treating subterranean formations | Iqbal Ahmed, Aly-Anis Hamouda, Odd Ivar Eriksen | 2000-04-18 |
| 6030928 | Polymers useful in the recovery and processing of natural resources | G. Allan Stahl, I. John Westerman, Henry L. Hsieh | 2000-02-29 |
| 5922653 | Compositions and processes for treating subterranean formations | Iqbal Ahmed, Bharat B. Patel, Wayne S. Stewart | 1999-07-13 |
| 5905100 | Gelation of acrylamide-containing polymers with hexamethylenetetramine and an aminobenzoic acid compound or phenol | — | 1999-05-18 |
| 5883210 | Compositions and processes for treating subterranean formations | Iqbal Ahmed, Aly-Anis Hamouda, Odd Ivar Eriksen | 1999-03-16 |
| 5855244 | Compositions and processes for treating subterranean formations | Iqbal Ahmed, Aly-Anis Hamouda, Odd Ivar Eriksen | 1999-01-05 |
| 5849674 | Compositions and processes for oil field applications | Kelly B. Fox, Donald D. Bruning, David R. Zornes | 1998-12-15 |
| 5829527 | Compositions and applications thereof of water-soluble copolymers comprising an ampholytic imidazolium inner salt | Iqbal Ahmed, Henry L. Hsieh | 1998-11-03 |
| 5789350 | Compositions and processes for treating hydrocarbon-bearing formations | Iqbal Ahmed, Karen H. Carney | 1998-08-04 |
| 5789351 | Compositions useful for treating oil-bearing formation | Iqbal Ahmed | 1998-08-04 |
| 5763610 | Composition and processes for treating subterranean formations | Iqbal Ahmed, Odd Ivar Eriksen | 1998-06-09 |
| 5708107 | Compositions and processes for treating subterranean formations | Iqbal Ahmed, Aly-Anis Hamouda, Odd Ivar Eriksen | 1998-01-13 |
| 5650633 | Compositions and processes for treating subterranean formations | Iqbal Ahmed, Odd Ivar Eriksen | 1997-07-22 |
| 5642783 | Process for treating oil-bearing formation | Iqbal Ahmed | 1997-07-01 |
| 5547025 | Process for treating oil-bearing formation | Iqbal Ahmed | 1996-08-20 |
| 5478802 | Gelling compositions useful for oil field applications | — | 1995-12-26 |
| 5432153 | Gelling compositions useful for oil field applications | — | 1995-07-11 |
| 5423380 | Process for treating oil-bearing formation | Everett L. Johnston, Karen H. Carney | 1995-06-13 |
| 5399269 | Gelation of water soluble polymers | — | 1995-03-21 |
| 5382371 | Polymers useful in the recovery and processing of natural resources | G. Allan Stahl, I. John Westerman, Henry L. Hsieh, James H. Hedges, Geir Bjornson | 1995-01-17 |