Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7034193 | Method for purifying spent acid | Richard Liu, Philip Hill, Thomas Edwin Pruitt, Forrest Lee Sanders | 2006-04-25 |
| 6818799 | Process for removing tar from spent acid | Richard Liu, Philip Hill, Thomas Edwin Pruitt, Forrest Lee Sanders | 2004-11-16 |