Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4917789 | Catalytic dewaxing process | James R. Butler | 1990-04-17 |
| 4587371 | Hydrocarbon conversion of sulfur contaminated feed stock | Cleve H. Forward, James R. Butler | 1986-05-06 |