Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6344136 | Methods for reducing sulfur and carbon in petroleum refining processes | James R. Butler | 2002-02-05 |
| 6137020 | Alkylation process with reduced heavy residue | James R. Butler | 2000-10-24 |