US2862558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovering oils from formations
Assignee: Phillips Petroleum Co
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Filing: 1955-12-28
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Granted: 1958-12-02
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Expires: 1975-12-28
Abstract
No abstract record available.
Inventors
- 👤 Henry O Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:44
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
THE PRODUCTION OF TAR FROM BARTON TAR SAND WHICH COMPRISES FORMING A MIXTURE OF STEAM AND KEROSENE, IN WHICH THE STREAM IS IN EXCESS OVER THE KEROSENE, BY VOLUME OF VAPORS, AND THEN INJECTING THE MIXTURE OF VAPORS THUS OBTAINED AT A PRESSURE OF AT LEAST ABOUT 20 POUNDS PER SQUARE INCH GAGE AND AT A TEMPERATURE IN THE APPROXIMATE RANGE 225-500*F. INTO THE SAND AND THEN PRODUCING TAR FROM SAID SAND BY PASSING SAID MIXTURE THROUGH A SUBSTANTIAL PORTION OF SAID SAND.
Claim 2
Dependent Claim
83 words
THE PRODUCTION OF TAR FROM BARTON TAR SAND WHICH COMPRISES FORMING A MIXTURE OF STEAM AND KEROSENE, IN WHICH THE STREAM IS IN EXCESS OVER THE KEROSENE, BY VOLUME OF VAPORS, AND THEN INJECTING THE MIXTURE OF VAPORS THUS OBTAINED AT A PRESSURE OF AT LEAST ABOUT 20 POUNDS PER SQUARE INCH GAGE AND AT A TEMPERATURE IN THE APPROXIMATE RANGE 225-500*F. INTO THE SAND AND THEN PRODUCING TAR FROM SAID SAND BY PASSING SAID MIXTURE THROUGH A SUBSTANTIAL PORTION OF SAID SAND.
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) | 1961-12-01 | 1962-06-02 | 1962-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-01 | 1966-06-02 | 1966-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-01 | 1970-06-02 | 1970-12-02 | $7700.00 | Window Closed / Lapsed |