Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874506 | Catalytic two-stage coal hydrogenation process using extinction recycle of heavy liquid fraction | James B. MacArthur, Alfred G. Comolli | 1989-10-17 |
| 4853111 | Two-stage co-processing of coal/oil feedstocks | James B. MacArthur, Alfred G. Comolli | 1989-08-01 |
| 4842719 | Catalytic two-stage coal hydrogenation and hydroconversion process | James B. MacArthur, Alfred G. Comolli | 1989-06-27 |
| 4839030 | Coal liquefaction process utilizing coal/CO.sub.2 slurry feedstream | Alfred G. Comolli | 1989-06-13 |
| 4816141 | Catalytic two-stage liquefaction of coal utilizing cascading of used ebullated-bed catalyst | Alfred G. Comolli, James B. MacArthur | 1989-03-28 |