Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6972047 | Incorporation of gilsonite into asphalt compositions | James R. Butler, Paul Buras, Bill Lee | 2005-12-06 |
| 6933418 | Critical phase alkylation process | James R. Butler | 2005-08-23 |