Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7034193 | Method for purifying spent acid | Richard Liu, Philip Hill, Thomas Edwin Pruitt, Albert Yi Yang | 2006-04-25 |
| 6818799 | Process for removing tar from spent acid | Richard Liu, Philip Hill, Thomas Edwin Pruitt, Albert Yi Yang | 2004-11-16 |
| 6245216 | Method for fluidizing tars | Philip Hill, Thomas Edwin Pruitt, Gilles Guerin, Bruno Langlois | 2001-06-12 |
| 6197837 | Method for fluidizing tars | Philip Hill, Thomas Edwin Pruitt, Gilles Guerin, Bruno Langlois | 2001-03-06 |