US2805249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for hydrolyzing sulfonic acid anhydrides
Assignee: Honeywell International Inc
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Filing: 1954-09-14
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Granted: 1957-09-03
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Expires: 1974-09-14
Abstract
No abstract record available.
Inventors
- 👤 Everett E Gilbert
- 👤 Veldhuis Benjamin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:12
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A PROCESS FOR THE NEUTRALIZATION OF LONG CHAIN ALKYL AROMATIC HYDROCARBON SULFONIC ACIDS CONTAINING BETWEEN ABOUT 0.5% AND ABOUT 15% BY WEIGHT, BASED ON THE WEIGHT OF THE SULFONIC ACIDS, OF ANHYDRIDES OF SUCH ACIDS WHICH COMPRISES NEUTRALIZING THE CRUDE SULFONIC ACIDS WITH AN AQUEOUS SOLUTION OF AN ALAKALI METAL HYDROXIDE AT A TEMPERATURE NOT SUBSTANTIALLY IN EXCESS OF ABOUT 60*C. IN THE PRESENCE OF BETWEEN ABOUT 0.1% AND ABOUT 10% BY WEIGHT BASED ON THE WEIGHT OF THE SULFONIC ACIDS OF AN ORGANIC AMINE.
Claim 2
Dependent Claim
85 words
A PROCESS FOR THE NEUTRALIZATION OF LONG CHAIN ALKYL AROMATIC HYDROCARBON SULFONIC ACIDS CONTAINING BETWEEN ABOUT 0.5% AND ABOUT 15% BY WEIGHT, BASED ON THE WEIGHT OF THE SULFONIC ACIDS, OF ANHYDRIDES OF SUCH ACIDS WHICH COMPRISES NEUTRALIZING THE CRUDE SULFONIC ACIDS WITH AN AQUEOUS SOLUTION OF AN ALAKALI METAL HYDROXIDE AT A TEMPERATURE NOT SUBSTANTIALLY IN EXCESS OF ABOUT 60*C. IN THE PRESENCE OF BETWEEN ABOUT 0.1% AND ABOUT 10% BY WEIGHT BASED ON THE WEIGHT OF THE SULFONIC ACIDS OF AN ORGANIC AMINE.
References Cited (Backward Citations)
US2489316A
Cited
US2676185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |