US2885338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for retorting of oil shale
Assignee: ExxonMobil Oil Corp
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Filing: 1953-12-04
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Granted: 1959-05-05
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Expires: 1973-12-04
Abstract
No abstract record available.
Inventors
- 👤 Louis P Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:22
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
85 words
IN A METHOD FOR PRODUCING SHALE OIL FROM OIL SHALE BY HEATING A DOWNWARDLY MOVING COMPACT BED OF COLD, CRUSHED OIL SHALE AND FLOWING THE HOT VAPOROUS PRODUCTS SO OBTAINED UPWARDLY THROUGH SAID DOWNWARDLY MOVING BED, WHEREBY SAID OIL SHALE UNDERGOES RETORTATION AND THE RELEASED SHALE OIL VAPORS UNDERGO CONDENSATION UPON CONTACT WITH THE COUNTER-FLOWING COLD SHALE, THE IMPROVEMENT WHICH COMPRISES COLLECTING A PLURALITY OF LIQUID SHALE OIL FRACTIONS OF DIFFERING BOILING POINTS WITHIN SAID MOVING BED, WITHDRAWING SEPARATE STREAMS OF EACH OF SAID COL-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |