US2879208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shale oil recovery method and apparatus
Assignee: Fluor Corp
•
Filing: 1958-05-19
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Granted: 1959-03-24
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Expires: 1978-05-19
Abstract
No abstract record available.
Inventors
- 👤 Donat B Brice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:54
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
IN THE PROCESS OF RECOVERING HYDROCARBONS FROM A BED OF BED OF HOT FLOWABLE SOLID HYDROCARBONACEOUS MATERIAL IN AN UPPER ZONE OPENLY EXPOSED TO A LOWER ZONE, THE STEPS THAT INCLUDE FLOWING SUFFICIENT GAS UPWARDLY AGAINST THE EXPOSED UNDERSIDE OF THE BED UPWARDLY WITHIN SAID BED SO AS TO RESTRAIN MATERIAL GRAVITATION INTO SAID LOWER
Claim 2
Dependent Claim
55 words
IN THE PROCESS OF RECOVERING HYDROCARBONS FROM A BED OF BED OF HOT FLOWABLE SOLID HYDROCARBONACEOUS MATERIAL IN AN UPPER ZONE OPENLY EXPOSED TO A LOWER ZONE, THE STEPS THAT INCLUDE FLOWING SUFFICIENT GAS UPWARDLY AGAINST THE EXPOSED UNDERSIDE OF THE BED UPWARDLY WITHIN SAID BED SO AS TO RESTRAIN MATERIAL GRAVITATION INTO SAID LOWER
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) | 1962-03-23 | 1962-09-22 | 1963-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-23 | 1966-09-22 | 1967-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-23 | 1970-09-22 | 1971-03-24 | $7700.00 | Window Closed / Lapsed |