US2783273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sulfonation of petroleum oils
Assignee: Sinclair Refining Co
•
Filing: 1952-07-01
•
Granted: 1957-02-26
•
Expires: 1972-07-01
Abstract
No abstract record available.
Inventors
- 👤 Guy M Verley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:08
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN THE SULFONATION OF PETROLEUM OILS HAVING A VISCOSITY OF ABOUT 100 TO 300 SSU AT 100*F., THE METHOD WHICH COMPRISES CONTACTING THE OIL FEED AND A CHLORINATED HYDROCARBON SOLVENT CONTAINING NOT MORE THAN TWO CARBON ATOMS WITH A SULFONATING AGENT WHICH CONSISTS ESSENTIALLY OF SULFUR TRIOXIDE AT A TEMPERATURE OF ABOUT 30* TO 90*F., REMOVING THE CHLORINATED SOLVENT FROM THE REACTION MIXTURE BY DISTILLATION, SEPARATING OIL-INSOLUBLE SLUDGE AND RECOVERING THE SULFONATED OIL.
Claim 2
Dependent Claim
73 words
IN THE SULFONATION OF PETROLEUM OILS HAVING A VISCOSITY OF ABOUT 100 TO 300 SSU AT 100*F., THE METHOD WHICH COMPRISES CONTACTING THE OIL FEED AND A CHLORINATED HYDROCARBON SOLVENT CONTAINING NOT MORE THAN TWO CARBON ATOMS WITH A SULFONATING AGENT WHICH CONSISTS ESSENTIALLY OF SULFUR TRIOXIDE AT A TEMPERATURE OF ABOUT 30* TO 90*F., REMOVING THE CHLORINATED SOLVENT FROM THE REACTION MIXTURE BY DISTILLATION, SEPARATING OIL-INSOLUBLE SLUDGE AND RECOVERING THE SULFONATED OIL.
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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) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |