Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4459201 | Oil shale retorting process utilizing indirect heat transfer | Frederick M. Gragg | 1984-07-10 | $22,767,000 |
| 4284423 | Separation of carbon dioxide and other acid gas components from hydrocarbon feeds containing admixtures of methane and hydrogen | Harry A. Marshall | 1981-08-18 | $24,160,000 |
| 4260421 | Cement production from coal conversion residues | Leo D. Brown, Nicholas C. Nahas, LeRoy R. Clavenna | 1981-04-07 | $55,985,000 |
| 4250160 | Production of ammonium sulfate | — | 1981-02-10 | $20,583,000 |
| 4219338 | Hydrothermal alkali metal recovery process | Denise Y. Wolfs, Le Roy R. Clavenna, Theodore Kalina | 1980-08-26 | $20,267,000 |
| 4211538 | Process for the production of an intermediate Btu gas | Nicholas C. Nahas, Charles A. Euker, Jr. | 1980-07-08 | $16,169,000 |
| 4211669 | Process for the production of a chemical synthesis gas from coal | Harry A. Marshall, Theodore Kalina | 1980-07-08 | $16,169,000 |