Patent US3409637A successfully refreshed from Google Patents.
US3409637A
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US
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Sulfonating olefins with gaseous sulfur trioxide and compositions obtained thereby
Assignee: ConocoPhillips Co
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Filing: 1963-07-22
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Granted: 1968-11-05
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Expires: 1983-07-22
Abstract
No abstract record available.
Inventors
- 👤 Raymond D Eccles
- 👤 James E Yates
- 👤 Ted P Matson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:07
CPC Classifications
C; C07; C07C; C07C309/00; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/14; C11D1/143; C11D3/00; C11D3/02; C11D3/04; C11D3/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
AN IMPROVED METHOD FOR PREPARING A SURFACE ACTIVE COMPOSITION COMPRISING THE STEPS: (A) CONTACTING AN ESSENTIALLY LINEAR C12-C20 MONOOLEFIN MAINTAINED AT A TEMPERATURE NOT GREATER THAN ABOUT 50*C. WITH A GASEOUS MIXTURE OF FROM ABOUT 0.1 TO 10 PARTS BY VOLUME SULFUR TRIOXIDE AND CORRESPONDINGLY FROM ABOUT 99.9 TO 90 PARTS BY VOLUME OF AN INERT CARRIER GAS UNTIL NOT IN EXCESS OF ABOUT 1 MOL OF SULFUR TRIOXIDE PER MOL OF SAID OLEFIN IS REACTED; (B) HYDROLYZING THE REACTION PRODUCT OF STEP (A); (C) NEUTRALIZING SAID HYDROLYZED REACTION PRODUCT WITH A WATER-SOLUBLE BASE, AND THEREUPON; (D) RECOVERING AS THE SURFACE ACTIVE COMPOSITION THE SULFONATE CONTENT OF SAID NEUTRALIZED MIXTURE.
Claim 2
Dependent Claim
110 words
AN IMPROVED METHOD FOR PREPARING A SURFACE ACTIVE COMPOSITION COMPRISING THE STEPS: (A) CONTACTING AN ESSENTIALLY LINEAR C12-C20 MONOOLEFIN MAINTAINED AT A TEMPERATURE NOT GREATER THAN ABOUT 50*C. WITH A GASEOUS MIXTURE OF FROM ABOUT 0.1 TO 10 PARTS BY VOLUME SULFUR TRIOXIDE AND CORRESPONDINGLY FROM ABOUT 99.9 TO 90 PARTS BY VOLUME OF AN INERT CARRIER GAS UNTIL NOT IN EXCESS OF ABOUT 1 MOL OF SULFUR TRIOXIDE PER MOL OF SAID OLEFIN IS REACTED; (B) HYDROLYZING THE REACTION PRODUCT OF STEP (A); (C) NEUTRALIZING SAID HYDROLYZED REACTION PRODUCT WITH A WATER-SOLUBLE BASE, AND THEREUPON; (D) RECOVERING AS THE SURFACE ACTIVE COMPOSITION THE SULFONATE CONTENT OF SAID NEUTRALIZED MIXTURE.
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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) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |