US3594303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal hydrogenation process
Assignee: Sunoco Inc
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Filing: 1970-02-18
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Granted: 1971-07-20
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Expires: 1990-02-18
Abstract
Abstract A PROCESS FOR HYDROGENATION OF COAL WHERE A SLURRY OF PULVERIZED COAL IN A HYDROGEN DONOR SOLVENT IS HYDROGENATED IN THE LIQUID PHASE IN THE ABSENCE OF CATALYST, VAPORS FROM THIS FIRST HYDROGENATION ARE THEN SUBJECTED TO A VAPOR PHASE HYDROGENATION IN THE PRESENCE OF A SULFIDED CATALYST AND THEREAFTER THE PRODUCTS OF THE REACTION ARE SEPARATED.
Inventors
- 👤 Merritt C Kirk Jr
- 👤 Walter H Seitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:32
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/06; C10G1/065; C10G1/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |