Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5468536 | Sorbent articles | Thomas I. Insley, Simon S. Fung | 1995-11-21 |
| 4944905 | Particulate ceramic useful as a proppant | James L. Gibb, James A. Laird, George Lee | 1990-07-31 |
| 4680230 | Particulate ceramic useful as a proppant | James L. Gibb, James A. Laird, George Lee | 1987-07-14 |