Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4607700 | Alpha-olefin sulfonate dimer surfactant cyclic steam stimulation process for recovering hydrocarbons from a subterranean formation | John H. Duerksen, Robert G. Wall | 1986-08-26 |
| 4576232 | Non-condensible gas injection including alpha-olefin sulfonate dimer surfactant additives and a process of stimulating hydrocarbon recovery from a subterranean formation | John H. Duerksen, Robert G. Wall | 1986-03-18 |
| 4572294 | Non-condensible gas injection including alpha-olefin sulfonate surfactant additives | John H. Duerksen, Robert G. Wall | 1986-02-25 |
| 4556107 | Steam injection including alpha-olephin sulfonate dimer surfactant additives and a process of stimulating hydrocarbon recovery from a subterranean formation | John H. Duerksen, Robert G. Wall | 1985-12-03 |