US3318798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retorting of oil shale
Assignee: ExxonMobil Oil Corp
•
Filing: 1964-08-21
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Granted: 1967-05-09
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Expires: 1984-08-21
Abstract
No abstract record available.
Inventors
- 👤 Edward F Kondis
- 👤 Fritz A Smith
- 👤 Jr Paul W Snyder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:50
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD FOR THERMALLY DISTILLING OIL SHALE AT A SHALE RATE ABOVE ABOUT 300 LBS./HR.-FT.2 WHICH COMPRISES PASSING CRUSHED OIL SHALE MATERIAL DOWNWARDLY THROUGH A GASCOMBUSTION RETORT AS A RELATIVELY DENSE MOVING MASS OF MATERIAL THROUGH A SHALE PREHEAT ZONE, A RETORTING ZONE, A COMBUSTION ZONE AND A SHALE COOLING ZONE, PASSING RECYCLED SHALE GASES UPWARDLY THROUGH THE RETORT IN DIRECT HEAT EXCHANGED RELATIONSHIP WITH THE DOWNWARDLY MOVING SHALE, INTRODUCING A COMBUSTION SUPPORTING GAS TO THE RETORT COMBUSTION ZONE AND CONTROLLING GAS TEMPERATURES WITHIN THE RETORT TO NOT EXCEED ABOVE ABOUT 1800*F. BY SUPPLYING A MAJOR PORTION OF THE HEAT OF RETORTING THROUGH PREHEATING OF THE INTRODUCED COMBUSTION SUPPORTING GAS EXTERNAL TO THE RETORT BY AT LEAST THE AMOUNT DETERMINED FROM THE RELATIONSHIP:
Claim 2
Independent Claim
123 words
A METHOD FOR THERMALLY DISTILLING OIL SHALE AT A SHALE RATE ABOVE ABOUT 300 LBS./HR.-FT.2 WHICH COMPRISES PASSING CRUSHED OIL SHALE MATERIAL DOWNWARDLY THROUGH A GASCOMBUSTION RETORT AS A RELATIVELY DENSE MOVING MASS OF MATERIAL THROUGH A SHALE PREHEAT ZONE, A RETORTING ZONE, A COMBUSTION ZONE AND A SHALE COOLING ZONE, PASSING RECYCLED SHALE GASES UPWARDLY THROUGH THE RETORT IN DIRECT HEAT EXCHANGED RELATIONSHIP WITH THE DOWNWARDLY MOVING SHALE, INTRODUCING A COMBUSTION SUPPORTING GAS TO THE RETORT COMBUSTION ZONE AND CONTROLLING GAS TEMPERATURES WITHIN THE RETORT TO NOT EXCEED ABOVE ABOUT 1800*F. BY SUPPLYING A MAJOR PORTION OF THE HEAT OF RETORTING THROUGH PREHEATING OF THE INTRODUCED COMBUSTION SUPPORTING GAS EXTERNAL TO THE RETORT BY AT LEAST THE AMOUNT DETERMINED FROM THE RELATIONSHIP:
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) | 1970-05-08 | 1970-11-07 | 1971-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-08 | 1974-11-07 | 1975-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-08 | 1978-11-07 | 1979-05-09 | $7700.00 | Window Closed / Lapsed |