Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5230814 | Hydrocarbon recovery comprising injecting a slug comprising oil soluble alkoxylated surfactants from lignin | Douglas G. Naae, Michael G. DaGue | 1993-07-27 |
| 4220204 | Oil recovery method utilizing a dialkyl phenol polyethoxy alkyl sulfonate as a solubilizing co-surfactant | James W. Hughes, Mohan V. Kudchadker | 1980-09-02 |