Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4493370 | Urea as a cosurfactant in enhanced oil recovery processes | Paul R. Stapp | 1985-01-15 |
| 4490263 | N,N-Disubstituted amide cosurfactants in enhanced oil recovery processes | Paul R. Stapp | 1984-12-25 |