Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5989336 | Cement composition | Robert B. Carpenter, David L. Johnson | 1999-11-23 |
| 5117909 | Well conduit sealant and placement method | Bonsall S. Wilton, Roger D. Bradshaw, Kenneth R. Riggs | 1992-06-02 |
| 5005646 | Accelerating set of retarded cement | Robert B. Carpenter, William N. Wilson | 1991-04-09 |
| 4953620 | Accelerating set of retarded cement | Robert B. Carpenter, William N. Wilson | 1990-09-04 |