Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848465 | Use of alkali metal silicate foam with a chemical blowing agent | — | 1989-07-18 |
| 4848468 | Enhanced hydraulic fracturing of a shallow subsurface formation | Duane C. Uhri | 1989-07-18 |
| 4844163 | In-situ foaming of polymer profile control gels | E. Thomas Strom | 1989-07-04 |
| 4832123 | Removing fracture fluid via chemical blowing agents | Ibrahim S. Abou-Sayed | 1989-05-23 |
| 4830108 | Amino resin modified xanthan polymer foamed with a chemical blowing agent | Paul Shu | 1989-05-16 |
| 4813484 | Chemical blowing agents for improved sweep efficiency | — | 1989-03-21 |