Patent US2596793A successfully refreshed from Google Patents.
US2596793A
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Process for the extraction of valuable constituents from unexposed oil-bearing shales not spent by oxidation
Assignee: Individual
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Filing: 1949-05-11
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Granted: 1952-05-13
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Expires: 1969-05-11
Abstract
No abstract record available.
Inventors
- 👤 Ernest J Schabelitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:46
CPC Classifications
A; A23; A23B; A23B7/00; A23B7/04; A23B7/05; C; C10; C10G; C10G1/00; C10G1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR THE EXTRATION OF METHYLENE CHLORIDE-SOLUBLE CONSTITUENTS FROM UNEXPOSED OILBEARING SHALE NOT SPENT BY OXIDATION WHICH COMPRISES FORCING METHYLENE CHLORIDE AT A TEMPERATURE RANGING FROM ABOUT 35* TO 40.5* C. THROUGH SAID SHALE UNDER PRESSURE RANGING FROM 100 TO 1500 POUNDS PER SQUARE INCH FOR A PERIOD OF TIME RANGING FROM ABOUT ONE TO FIVE HOURS, SUFFICIENT TO LEACH OUT THE DESIRED AMOUNT OF THE DESIRED SAID CONSTITUENTS, SEPARATING THE LEACHED MATERIAL FROM THE RESULTING METHYLENE CHLORIDE SOLUTION RICH IN SAID DISSOLVED CONSTITUENTS, AND RECOVERING FROM THE SOLUTION THE SAID CONSTITUENTS DISSOLVED THEREIN.
Claim 2
Dependent Claim
95 words
A PROCESS FOR THE EXTRATION OF METHYLENE CHLORIDE-SOLUBLE CONSTITUENTS FROM UNEXPOSED OILBEARING SHALE NOT SPENT BY OXIDATION WHICH COMPRISES FORCING METHYLENE CHLORIDE AT A TEMPERATURE RANGING FROM ABOUT 35* TO 40.5* C. THROUGH SAID SHALE UNDER PRESSURE RANGING FROM 100 TO 1500 POUNDS PER SQUARE INCH FOR A PERIOD OF TIME RANGING FROM ABOUT ONE TO FIVE HOURS, SUFFICIENT TO LEACH OUT THE DESIRED AMOUNT OF THE DESIRED SAID CONSTITUENTS, SEPARATING THE LEACHED MATERIAL FROM THE RESULTING METHYLENE CHLORIDE SOLUTION RICH IN SAID DISSOLVED CONSTITUENTS, AND RECOVERING FROM THE SOLUTION THE SAID CONSTITUENTS DISSOLVED THEREIN.
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) | 1955-05-13 | 1955-11-12 | 1956-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-13 | 1959-11-12 | 1960-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-13 | 1963-11-12 | 1964-05-13 | $7700.00 | Window Closed / Lapsed |