Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4317893 | Oil recovery by waterflooding employing an anionic polymeric surfactant containing recurring succinimide or succinamide groups | Catherine S. H. Chen | 1982-03-02 |
| 4284517 | Oil recovery by waterflooding employing anionic polymeric surfactants | Catherine S. H. Chen | 1981-08-18 |
| 4222881 | Oil recovery process involving the injection of thickened water | Don E. Byham, Catherine S. H. Chen | 1980-09-16 |