US2884445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metal petroleum sulfonates
Assignee: Phillips Petroleum Co
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Filing: 1956-12-17
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Granted: 1959-04-28
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Expires: 1976-12-17
Abstract
No abstract record available.
Inventors
- 👤 William N Axe
- 👤 James T Gragson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:33
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE PROCESS OF MAKING AN ALKALINE EARTH METAL PETROLEUM SULFONATE WHICH COMPRISES ADDING OLEUM TO A PROPANE-FRACTIONATED, SOLVENT-EXTRACTED AND DE-WAXED LUBRICATING OIL STOCK HAVING A VISCOSITY OF ABOUT 200 TO 230 SUS AT 210*F. IN A PERIOD OF ABOUT ONE MINUTE AND WITH AGITATION; MAINTAINING THE RESULTING MIXTURE QUIESCENT FOR ABOUT ONE AND ONE HALF HOURS AT REACTION TEMPERATURE; NEUTRALIZING THE MIXTURE WITH AN ALKALINE EARTH METAL HYDROXIDE; DILUTING THE MIXTURE WITH ABOUT THREE VOLUMES OF PENTANE; AND RECOVERING THE RESULTING ALKALINE EARTH METAL PETROLEUM SULFONATE.
Claim 2
Dependent Claim
86 words
THE PROCESS OF MAKING AN ALKALINE EARTH METAL PETROLEUM SULFONATE WHICH COMPRISES ADDING OLEUM TO A PROPANE-FRACTIONATED, SOLVENT-EXTRACTED AND DE-WAXED LUBRICATING OIL STOCK HAVING A VISCOSITY OF ABOUT 200 TO 230 SUS AT 210*F. IN A PERIOD OF ABOUT ONE MINUTE AND WITH AGITATION; MAINTAINING THE RESULTING MIXTURE QUIESCENT FOR ABOUT ONE AND ONE HALF HOURS AT REACTION TEMPERATURE; NEUTRALIZING THE MIXTURE WITH AN ALKALINE EARTH METAL HYDROXIDE; DILUTING THE MIXTURE WITH ABOUT THREE VOLUMES OF PENTANE; AND RECOVERING THE RESULTING ALKALINE EARTH METAL PETROLEUM SULFONATE.
References Cited (Backward Citations)
US2660562A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |