Patent US2597834A successfully refreshed from Google Patents.
US2597834A
Expired / Lapsed
US
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Sulfonated phenyl alkane detergents and process of producing same
Assignee: California Research LLC
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Filing: 1947-10-18
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Granted: 1952-05-20
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Expires: 1967-10-18
Abstract
No abstract record available.
Inventors
- 👤 William H Claussen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:22
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/29; C07C309/30; C07C309/31
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
A PROCESS FOR PREPARATION OF A SULFONATED PHENYL ALKANE DETERGENT, WHICH COMPRISES SUBJECTING A CRACKED PETROLEUM OIL FRACTION BOILING UNDER NORMAL PRESSURE BETWEEN 300*F. AND 600* F. TO SILICA GEL ADSORPTION TREATMENT BY PASSING SAID FRACTION THROUGH A COLUMN OF SILICA GEL, REJECTING FROM A FRACTION SELECTED FOR FURTHER TREATMENT THE PORTION PASSING FROM THE SILICA GEL ADSORPTION HAVING ZERO BROMINE NUMBER AND ALSO REJECTING FROM THE FRACTION SELECTED FOR FURTHER TREATMENT THE PORTION PASSING FROM THE SILICA GEL ADSORBENT OBTAINED AFTER THE BROMINE NUMBER HAS PASSED THE MAXIMUM VALUE ON TREATMENT, ALKYLATING BENZENE WITH THE FRACTION SO SELECTED TO FORM A PHENYL ALKANE, ANDSULFONATING SAID PHENYL ALKANE.
Claim 2
Dependent Claim
108 words
A PROCESS FOR PREPARATION OF A SULFONATED PHENYL ALKANE DETERGENT, WHICH COMPRISES SUBJECTING A CRACKED PETROLEUM OIL FRACTION BOILING UNDER NORMAL PRESSURE BETWEEN 300*F. AND 600* F. TO SILICA GEL ADSORPTION TREATMENT BY PASSING SAID FRACTION THROUGH A COLUMN OF SILICA GEL, REJECTING FROM A FRACTION SELECTED FOR FURTHER TREATMENT THE PORTION PASSING FROM THE SILICA GEL ADSORPTION HAVING ZERO BROMINE NUMBER AND ALSO REJECTING FROM THE FRACTION SELECTED FOR FURTHER TREATMENT THE PORTION PASSING FROM THE SILICA GEL ADSORBENT OBTAINED AFTER THE BROMINE NUMBER HAS PASSED THE MAXIMUM VALUE ON TREATMENT, ALKYLATING BENZENE WITH THE FRACTION SO SELECTED TO FORM A PHENYL ALKANE, ANDSULFONATING SAID PHENYL ALKANE.
References Cited (Backward Citations)
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US2161173A
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US2260617A
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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) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |