Patent US3074877A successfully refreshed from Google Patents.
US3074877A
Expired / Lapsed
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Method for recovering oil from oil-bearing minerals
Assignee: Texaco Inc
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Filing: 1959-07-01
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Granted: 1963-01-22
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Expires: 1979-07-01
Abstract
No abstract record available.
Inventors
- 👤 Louis D Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:51
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/02; Y; Y10; Y10S; Y10S208/00; Y10S208/951
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF PROCESSING OIL-BEARING MINERALS SELECTED FROM THE GROUP CONSISTING OF OIL SHALES, OIL SANDS, AND TAR FOR THE RECOVERY OF HYDROCARBON OIL THEREFROM BY RETORTING WITH GAS WHICH COMPRISES CONTACTING SAID MINERAL IN A TREATING ZONE WITH CARBON DIOXIDE OF AT LEAST 90 VOLUME PERCENT PURITY AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 700* F. TO ABOUT 900* F. AND A CARBON DIOXIDE PARTIAL PRESSURE WITHIN THE RANGE OF FROM ABOUT 1,000 TO 3,000 POUNDS PER SQUARE INCH GAUGE, CON-
Claim 2
Independent Claim
84 words
A METHOD OF PROCESSING OIL-BEARING MINERALS SELECTED FROM THE GROUP CONSISTING OF OIL SHALES, OIL SANDS, AND TAR FOR THE RECOVERY OF HYDROCARBON OIL THEREFROM BY RETORTING WITH GAS WHICH COMPRISES CONTACTING SAID MINERAL IN A TREATING ZONE WITH CARBON DIOXIDE OF AT LEAST 90 VOLUME PERCENT PURITY AT A TEMPERATURE IN THE RANGE OF FROM ABOUT 700* F. TO ABOUT 900* F. AND A CARBON DIOXIDE PARTIAL PRESSURE WITHIN THE RANGE OF FROM ABOUT 1,000 TO 3,000 POUNDS PER SQUARE INCH GAUGE, CON-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-21 | 1966-07-23 | 1967-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-21 | 1970-07-23 | 1971-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-21 | 1974-07-23 | 1975-01-22 | $7700.00 | Window Closed / Lapsed |