Issued Patents All Time
Showing 76–77 of 77 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4305812 | Solvent deasphalting by polarity gradient extraction | Samuel A. Tabak, Philip J. Angevine, Michael B. Carroll | 1981-12-15 |
| 4267033 | Upgrading of aromatic liquids | Roland H. Heck, Stephen M. Oleck, Robert Wilson | 1981-05-12 |