Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4502540 | Tertiary oil recovery | — | 1985-03-05 |
| 4222881 | Oil recovery process involving the injection of thickened water | Edward W. Sheppard, Catherine S. H. Chen | 1980-09-16 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4502540 | Tertiary oil recovery | — | 1985-03-05 |
| 4222881 | Oil recovery process involving the injection of thickened water | Edward W. Sheppard, Catherine S. H. Chen | 1980-09-16 |