US2769767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of separating organic acids from petroleum oils by extracting the oil with an aqueous mixture of an amine and an alcohol
Assignee: Pure Oil Co
•
Filing: 1953-07-03
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Granted: 1956-11-06
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Expires: 1973-07-03
Abstract
No abstract record available.
Inventors
- 👤 William L Fierce
- 👤 Gifford W Crosby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:41
CPC Classifications
C; C10; C10G; C10G19/00; C10G21/00; C10G21/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
53 words
THE PROCESS OF SEPARATING ORGANIC ACIDS FROM HEAVY PETROLEUM FRACTIONS COMPRISING CONTACTING SAID FRACTION WITH A MIXTURE OF 10 TO 15 PERCENT OF AN ALIPHATIC ORGANIC AMINE, 10 TO 20 PERCENT BY VOLUME OF WATER, AND 65 TO 80 PERCENT BY VOLUME OF AN ALCOHOL HAVING LESS THAN 7 CARBON ATOMS PER MOLECULE.
Claim 2
Dependent Claim
53 words
THE PROCESS OF SEPARATING ORGANIC ACIDS FROM HEAVY PETROLEUM FRACTIONS COMPRISING CONTACTING SAID FRACTION WITH A MIXTURE OF 10 TO 15 PERCENT OF AN ALIPHATIC ORGANIC AMINE, 10 TO 20 PERCENT BY VOLUME OF WATER, AND 65 TO 80 PERCENT BY VOLUME OF AN ALCOHOL HAVING LESS THAN 7 CARBON ATOMS PER MOLECULE.
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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |