Patent US3567622A successfully refreshed from Google Patents.
US3567622A
Expired / Lapsed
US
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Oil recovery process
Assignee: COLEMAN D STEPHENS JR
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Filing: 1968-11-21
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Granted: 1971-03-02
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Expires: 1988-11-21
Abstract
Abstract A NONCOMBUSTIVE, ATMOSPHERIC PRESSURE, RETORTING PROCESS FOR THE PRODUCTION OF HIGH GRADE CRUDE PETROLEUM AND PETROCHEMICALS FROM CARBONACEOUS SOLIDS WHEREIN SUPERHEATED STEAM COMPRISES A SYSTEM CARRIER FLUID AND HYDROGEN DONOR AND THE RETORTING IS CARRIED OUT IN THE PRESENCE OF A MINOR PROPORTION OF A MIDDLE FRACTION HYDROCARBON OIL SELECTIVELY COMMINGLED WITH THE CARBONACEOUS SOLID IN THE RETORT ZONE OR INJECTED INTO THE RETORT ZONE WITH THE CARRIER FLUID.
Inventors
- 👤 Owen R Waltrip
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:26
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02; C10G1/04; C10G1/042; 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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |