Patent US2685555A successfully refreshed from Google Patents.
US2685555A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil extraction from shale
Assignee: Phillips Petroleum Co
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Filing: 1950-12-20
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Granted: 1954-08-03
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Expires: 1970-12-20
Abstract
No abstract record available.
Inventors
- 👤 Robert A Findlay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:23
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A METHOD FOR RECOVERING SHALE OIL FROM SHALE WHICH COMPRISES THE STEPS OF FORMING A SLURRY OF SHALE WITH A REFRACTORY OIL; PASSING SAID SLURRY DOWNWARDLY IN A FRACTIONATION VESSEL, PROVIDED WITH MEANS FOR EFFECTING INTIMATE CONTACT BETWEEN SLURRY AND VAPORS, INTO COUNTER-CURRENT HEAT-EXTRACTION RELATIONSHIP WITH HOT VAPORS OF A REFRACTORY OIL, THUS FORMING VAPOROUS OIL PROD-
Claim 2
Independent Claim
57 words
A METHOD FOR RECOVERING SHALE OIL FROM SHALE WHICH COMPRISES THE STEPS OF FORMING A SLURRY OF SHALE WITH A REFRACTORY OIL; PASSING SAID SLURRY DOWNWARDLY IN A FRACTIONATION VESSEL, PROVIDED WITH MEANS FOR EFFECTING INTIMATE CONTACT BETWEEN SLURRY AND VAPORS, INTO COUNTER-CURRENT HEAT-EXTRACTION RELATIONSHIP WITH HOT VAPORS OF A REFRACTORY OIL, THUS FORMING VAPOROUS OIL PROD-
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) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |