Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4581131 | Method for removal of phenolic materials from mixtures thereof | — | 1986-04-08 |
| 4577049 | Alkylation of durene utilizing high boiling condensed polyaromatic compounds | — | 1986-03-18 |
| 4539096 | Process for recovering oil and metals from oil shale | — | 1985-09-03 |
| 4493762 | Method for reducing the nitrogen content of shale oil with spent oil shale and sulfuric acid | — | 1985-01-15 |
| 4446004 | Process for upgrading vacuum resids to premium liquid products | Nai Y. Chen, Lillian A. Rankel | 1984-05-01 |
| 4414102 | Process for reducing nitrogen and/or oxygen heteroatom content of a mineral oil | Lillian A. Rankel | 1983-11-08 |
| 4409089 | Coal liquefaction and resid processing with lignin | — | 1983-10-11 |
| 4303496 | Coal liquefaction process | — | 1981-12-01 |
| 4242195 | Extraction of tar sands or oil shale with organic sulfoxides or sulfones | — | 1980-12-30 |