Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5095985 | Enhance oil recovery using oil soluble sulfonate surfactants from lignin and alkylphenol | Douglas G. Naae | 1992-03-17 |
| 5095986 | Enhanced oil recovery using oil soluble sulfonates from lignin and benzyl alcohol | Douglas G. Naae | 1992-03-17 |