US2739982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacturing hydrocarbon sulfonates
Assignee: Bray Chemical Co
•
Filing: 1953-04-28
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Granted: 1956-03-27
•
Expires: 1973-04-28
Abstract
No abstract record available.
Inventors
- 👤 Robert B Roessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:52
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE PROCESS OF MAKING PETROLEUM SULFONATES OF THE ALKALI AND ALKALINE EARTH METALS AND AMMONIUM, SUBSTANTIALLY FREE OF IRON, WHICH COMPRISES SULFONATING A PETROLEUM LUBRICATING OIL, DILUTING THE SULFONATION PRODUCT WITH A NORMALLY LIQUID HYDROCARBON SOLVENT, SEPARATING THE OIL PHASE FROM ACID SLUDGE, NEUTRALIZING SAID OIL PHASE, REMOVING HYDROCARBON SOLVENT FROM THE NEUTRALIZED OILSULFONATE PRODUCT, CONTACTING SAID OIL-SULFONATE SOLUTION WITH ABOUT 0.2 TO 2% OF AN ALKALI IN THE PRESNECE OF A LOWER, SATURATED ALIPHATIC ALCOHOL, SEPARATING AN INSOLUBLE SLUDGE AND RECOVERING OIL AND SULFONATE FROM THE OIL PHASE, FROM WHICH SAID SLUDGE HAS BEEN SEPARATED.
Claim 2
Dependent Claim
96 words
THE PROCESS OF MAKING PETROLEUM SULFONATES OF THE ALKALI AND ALKALINE EARTH METALS AND AMMONIUM, SUBSTANTIALLY FREE OF IRON, WHICH COMPRISES SULFONATING A PETROLEUM LUBRICATING OIL, DILUTING THE SULFONATION PRODUCT WITH A NORMALLY LIQUID HYDROCARBON SOLVENT, SEPARATING THE OIL PHASE FROM ACID SLUDGE, NEUTRALIZING SAID OIL PHASE, REMOVING HYDROCARBON SOLVENT FROM THE NEUTRALIZED OILSULFONATE PRODUCT, CONTACTING SAID OIL-SULFONATE SOLUTION WITH ABOUT 0.2 TO 2% OF AN ALKALI IN THE PRESNECE OF A LOWER, SATURATED ALIPHATIC ALCOHOL, SEPARATING AN INSOLUBLE SLUDGE AND RECOVERING OIL AND SULFONATE FROM THE OIL PHASE, FROM WHICH SAID SLUDGE HAS BEEN SEPARATED.
References Cited (Backward Citations)
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US1901383A
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US2097440A
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US2357866A
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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) | 1959-03-27 | 1959-09-26 | 1960-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-27 | 1963-09-26 | 1964-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-27 | 1967-09-26 | 1968-03-27 | $7700.00 | Window Closed / Lapsed |