Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5375459 | Defoamer testing apparatus | Jose M. Rodriguez, John J. Palmer | 1994-12-27 |
| 5127473 | Repair of microannuli and cement sheath | Kirk L. Harris, Edward F. Vinson, Daniel L. Bour, David Ewert | 1992-07-07 |
| 5121795 | Squeeze cementing | David Ewert, D. P. Kundert, Jeffrey A. Dahl, E. Dwyann Dalrymple | 1992-06-16 |
| 4557763 | Dispersant and fluid loss additives for oil field cements | Charles R. George | 1985-12-10 |