Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4493765 | Selective separation of heavy oil using a mixture of polar and nonpolar solvents | Robert B. Long | 1985-01-15 |
| 4419219 | Adsorption of basic asphaltenes on solid acid catalysts | Robert B. Long | 1983-12-06 |