US2848415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a metal petroleum sulfonate
Assignee: Phillips Petroleum Co
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Filing: 1956-01-16
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Granted: 1958-08-19
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Expires: 1976-01-16
Abstract
No abstract record available.
Inventors
- 👤 Richard S Logan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:58
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
THE METHOD OF MAKING A METAL PETROLEUM SULFONATE WHICH COMPRISES SULFONATING A LUBRICATING OIL STOCK HAVING A VISCOSITY OF 200 TO 230 SAYBOLT UNIVERSAL SECONDS AT 210*F., TREATING THE ENTIRE SULFONATION PRODUCT WITH AN AQUEOUS ALCOHOL SOLUTION OF SUBSTANTIALLY THE AZEOTROPIC CONCENTRATION, THEREBY SEPARATING THE SULFONATED MATERIAL INTO AN EXTRACT FRACTION AND A RAFFINATE FRACTION, SAID ALCOHOL HAVING NO MORE THAN 7 CARBON ATOMS, NEUTRALIZING THE EXTRACT WITH A BASIC METAL COMPOUND, AND RECOVERING THE RESULTING METAL PETROLEUM SULFONATE.
Claim 2
Independent Claim
79 words
THE METHOD OF MAKING A METAL PETROLEUM SULFONATE WHICH COMPRISES SULFONATING A LUBRICATING OIL STOCK HAVING A VISCOSITY OF 200 TO 230 SAYBOLT UNIVERSAL SECONDS AT 210*F., TREATING THE ENTIRE SULFONATION PRODUCT WITH AN AQUEOUS ALCOHOL SOLUTION OF SUBSTANTIALLY THE AZEOTROPIC CONCENTRATION, THEREBY SEPARATING THE SULFONATED MATERIAL INTO AN EXTRACT FRACTION AND A RAFFINATE FRACTION, SAID ALCOHOL HAVING NO MORE THAN 7 CARBON ATOMS, NEUTRALIZING THE EXTRACT WITH A BASIC METAL COMPOUND, AND RECOVERING THE RESULTING METAL PETROLEUM SULFONATE.
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) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |