US3577338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovery of oil from oil shale simultaneously producing hydrogen
Assignee: PHILLIP H GIFFORD
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Filing: 1969-02-19
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Granted: 1971-05-04
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Expires: 1989-02-19
Abstract
Abstract A PROCESS FOR RETORTING OIL SHALE AND SIMULTANEOUSLY PRODUCING A HYDROGEN AS A BY-PRODUCT WITH HIGH YIELDS OF BOTH OIL AND HYDROGEN, THE PROCESS COMPRISING CONTINUOUSLY PASSING OIL SHALE THROUGH A COMBUSTION ZONE IN A RETORT WHILE CONTINUOUSLY INTRODUCING STEAM AND OXYGEN INTO THE COMBUSTION ZONE, REMOVING SPENT SHALE BELOW THE COMBUSTION ZONE AND RECOVERING OIL AND HYDROGEN FROM THE RETORT OFF GAS FROM THE COMBUSTION ZONE. HYDROGEN IS PRODUCED BY THE REACTION OF CARBON CONTAINING MATERIAL WITH STEAM.
Inventors
- 👤 Phillip H Gifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:13
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02; C10G1/002; C10G1/06
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) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |