Patent US3772373A successfully refreshed from Google Patents.
US3772373A
Expired / Lapsed
US
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Preparation of high molecular weight alkylbenzene sulfonyl chlorides
Assignee: BP Corp North America Inc
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Filing: 1969-10-30
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Granted: 1973-11-13
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Expires: 1989-10-30
Abstract
Abstract ALKYLBENZENE SULFONYL CHLORIDE: 1-R,3-(CL-SO2-)BENZENE WHEREIN R IS AN ALKYL GROUP, CAN BE PREPARED BY A CHLOROSULFONATION OF ALKYLBENZENE HYDROCARBONS WITHOUT FORMATION OF SULFURIC ACID AND WITHOUT CHLORINATION OF ALKYLBENZENE SULFONIC ACID. SAID METHOD IS CARRIED OUT BY REACTING ALKYLBENZENE WITH 1.0:1.0 MOLAR MIXTURE OF CHLOROSULFONIC ACID (CISO3H) AND SULFURYLCHLORIDE (SO2CL2).
Inventors
- 👤 R Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:56
CPC Classifications
C; C07; C07C; C07C303/00; C07C303/02; C07C303/04; C07C303/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |