Patent US2652427A successfully refreshed from Google Patents.
US2652427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of sulfonation products
Assignee: Honeywell International Inc
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Filing: 1950-08-26
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Granted: 1953-09-15
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Expires: 1970-08-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Andrew Shultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:11
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
129 words
IN THE PRODUCTION OF ALKYLAROMATIC SULPHONIC ACIDS, THE STEPS COMPRISING REACTING AN ALKYLAROMATIC HYDROCARBON CONTAINING FROM 10 TO 20 CARBON ATOMS IN THE ALKYL GROUP WITH A SULPHONATING AGENT TO PRODUCE A LIQUID PRODUCT COMPRISING ALKYLAROMATIC SULPHONIC ACID AND SULPHONATING AGENT IN ADMIXTURE, SUBSEQUENTLY MIXING SUCH ADMIXED SULPHONIC ACID AND SULPHONATING AGENT WITH A WATER-SOLUBLE POLYHYDRIC ALCOHOL IN QUANTITY NO GREATER THAN ABOUT 25% BY WEIGHT WITH RESPECT TO THE QUANTITY OF ALKYLAROMATIC SULPHONIC ACID PRESENT BUT SUCH AS TO PRODUCE A SYSTEM SEPARABLE INTO MASSES OF DIFFERING DENSITIES, ONE OF SAID MASSES COMPRISING ALKYLAROMATIC SULPHONIC ACID AND ANOTHER COMPRISING THE BULK OF THE POLYHYDRIC ALCOHOL AND SUBSTANTIALLY ALL OF THE SULPHONATING AGENT PRESENT IN THE AFORESAID PRODUCT, EFFECTING SUCH SEPARATION, AND WITHDRAWING THE LAST-NAMED MASS FROM THE SYSTEM.
Claim 2
Dependent Claim
129 words
IN THE PRODUCTION OF ALKYLAROMATIC SULPHONIC ACIDS, THE STEPS COMPRISING REACTING AN ALKYLAROMATIC HYDROCARBON CONTAINING FROM 10 TO 20 CARBON ATOMS IN THE ALKYL GROUP WITH A SULPHONATING AGENT TO PRODUCE A LIQUID PRODUCT COMPRISING ALKYLAROMATIC SULPHONIC ACID AND SULPHONATING AGENT IN ADMIXTURE, SUBSEQUENTLY MIXING SUCH ADMIXED SULPHONIC ACID AND SULPHONATING AGENT WITH A WATER-SOLUBLE POLYHYDRIC ALCOHOL IN QUANTITY NO GREATER THAN ABOUT 25% BY WEIGHT WITH RESPECT TO THE QUANTITY OF ALKYLAROMATIC SULPHONIC ACID PRESENT BUT SUCH AS TO PRODUCE A SYSTEM SEPARABLE INTO MASSES OF DIFFERING DENSITIES, ONE OF SAID MASSES COMPRISING ALKYLAROMATIC SULPHONIC ACID AND ANOTHER COMPRISING THE BULK OF THE POLYHYDRIC ALCOHOL AND SUBSTANTIALLY ALL OF THE SULPHONATING AGENT PRESENT IN THE AFORESAID PRODUCT, EFFECTING SUCH SEPARATION, AND WITHDRAWING THE LAST-NAMED MASS FROM THE SYSTEM.
References Cited (Backward Citations)
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US2268140A
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US2244512A
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US2334532A
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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) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |