Patent US2897156A successfully refreshed from Google Patents.
US2897156A
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Manufacture of alkyl benzene sulfonate detergents
Assignee: California Research LLC
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Filing: 1951-09-14
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Granted: 1959-07-28
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Expires: 1971-09-14
Abstract
No abstract record available.
Inventors
- 👤 Allen H Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:32
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28; C07C309/29; C07C309/30; C07C309/31; C07C303/00; C07C303/02; C07C303/04; C07C303/06; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN THE PROCESS OF MANUFACTURING ALKYL ARYL SULFONATE DETERGENTS BY SULFONATING C9 TO C18 MONOALKYL BENZENES, ADDING WATER TO THE SULFONATION REACTION PRODUCT MIXTURE, SETTLING THE RESULTING MIXTURE TO SEPARATE A SULFONIC ACID PHASE AND A SULFURIC ACID PHASE, AND NEUTRALIZING THE SULFONIC ACID PHASE WITH SODIUM HYDROXIDE, THE METHOD OF SUBSTANTIALLY REDUCING THE TIME REQUIRED TO EFFECT SAID PHASE SEPARATION WHICH COMPRISES ADDING TO SAID ALKYL BENZENES FROM AT LEAST 5 TO 10% BY WEIGHT, BASED THEREON, OF AN AROMATIC HYDROCARBON MATERIAL FROM THE GROUP CONSISTING OF BENZENE AND TOLUENE PRIOR TO SAID SULFONATION.
Claim 2
Dependent Claim
95 words
IN THE PROCESS OF MANUFACTURING ALKYL ARYL SULFONATE DETERGENTS BY SULFONATING C9 TO C18 MONOALKYL BENZENES, ADDING WATER TO THE SULFONATION REACTION PRODUCT MIXTURE, SETTLING THE RESULTING MIXTURE TO SEPARATE A SULFONIC ACID PHASE AND A SULFURIC ACID PHASE, AND NEUTRALIZING THE SULFONIC ACID PHASE WITH SODIUM HYDROXIDE, THE METHOD OF SUBSTANTIALLY REDUCING THE TIME REQUIRED TO EFFECT SAID PHASE SEPARATION WHICH COMPRISES ADDING TO SAID ALKYL BENZENES FROM AT LEAST 5 TO 10% BY WEIGHT, BASED THEREON, OF AN AROMATIC HYDROCARBON MATERIAL FROM THE GROUP CONSISTING OF BENZENE AND TOLUENE PRIOR TO SAID SULFONATION.
References Cited (Backward Citations)
US2456119A
Cited
US2615847A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-27 | 1963-01-26 | 1963-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-27 | 1967-01-26 | 1967-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-27 | 1971-01-26 | 1971-07-28 | $7700.00 | Window Closed / Lapsed |