Patent US2670317A successfully refreshed from Google Patents.
US2670317A
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Extraction of oleaginous materials from solid substances
Assignee: Universal Oil Products Co
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Filing: 1949-05-27
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Granted: 1954-02-23
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Expires: 1969-05-27
Abstract
No abstract record available.
Inventors
- 👤 George F Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:12
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/002; C10G1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A PROCESS OF EXTRACTING OIL AND ASPHALT FROM A SOLID MATERIAL CONTAINING THE SAME, WHICH COMPRISING CONTACTING THE SOLID MATERIAL WITH A LIQUEFIED NORMALLY GASEOUS HYDROCARBON SOLVENT AT APPROXIMATELY ATMOSPHERIC PRESSURE AND AT ABOUT THE ATMOSPHERIC BOILING POINT OF THE SOLVENT TO DISSOLVE OIL AND ASPHALT IN THE SOLVENT, SEPARATING THE RESULTANT SOLUTION FROM THE SOLID MATERIAL, HEATING SAID SOLUTION UNDER PRESSURE TO PRECIPITATE ASPHALT THEREFROM AND RECOVERING THE PRECIPITATED ASPHALT, FURTHER HEATING THE REMAINING SOLUTION OF SOIL AND SOLVENT UNDER PRESSURE TO AT LEAST THE CRITICAL TEMPERATURE OF SAID SOLVENT TO FORM A
Claim 2
Dependent Claim
94 words
A PROCESS OF EXTRACTING OIL AND ASPHALT FROM A SOLID MATERIAL CONTAINING THE SAME, WHICH COMPRISING CONTACTING THE SOLID MATERIAL WITH A LIQUEFIED NORMALLY GASEOUS HYDROCARBON SOLVENT AT APPROXIMATELY ATMOSPHERIC PRESSURE AND AT ABOUT THE ATMOSPHERIC BOILING POINT OF THE SOLVENT TO DISSOLVE OIL AND ASPHALT IN THE SOLVENT, SEPARATING THE RESULTANT SOLUTION FROM THE SOLID MATERIAL, HEATING SAID SOLUTION UNDER PRESSURE TO PRECIPITATE ASPHALT THEREFROM AND RECOVERING THE PRECIPITATED ASPHALT, FURTHER HEATING THE REMAINING SOLUTION OF SOIL AND SOLVENT UNDER PRESSURE TO AT LEAST THE CRITICAL TEMPERATURE OF SAID SOLVENT TO FORM A
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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) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |