Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4946583 | Process for the liquefaction of coal | — | 1990-08-07 |
| 4689139 | Process for the hydrogenation of coal | — | 1987-08-25 |
| 4492623 | Process for the hydrogenation of coal using a split feed | — | 1985-01-08 |
| 4421632 | Process for hydrogenation of coal | — | 1983-12-20 |
| 4257870 | Process for the purification of undistillable solid-containing hydrocarbon fractions produced in coal-refining | Sigurd Jorzyk | 1981-03-24 |
| 4214974 | Process for hydrogenation of coal | — | 1980-07-29 |