Patent US3717392A successfully refreshed from Google Patents.
US2887504A
Expired / Lapsed
US
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Dialkyl esters of sulfodicarboxylic acids
Assignee: Wyeth Holdings LLC
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Filing: 1956-09-19
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Granted: 1959-05-19
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Expires: 1976-09-19
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Carnes
- 👤 Emil A Vitalis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:47
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/02; C07C309/03; C07C309/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
43 words
AN ALKALI METAL SALT OF A BIS-ESTER OF SULFOSUCCINIC ACID WITH A MIXTURE OF DODECYLCARBINOLS HAVING AN A.S.T.M. BOILING RANGE OF FROM 240* C. TO 265* C. AT ATMOSPHERIC PRESSURE, A HYDROXYL NUMBER OF ABOUT 230 AND A STRUCTURE CORRESPONDING TO THE FORMULA
Claim 2
Dependent Claim
43 words
AN ALKALI METAL SALT OF A BIS-ESTER OF SULFOSUCCINIC ACID WITH A MIXTURE OF DODECYLCARBINOLS HAVING AN A.S.T.M. BOILING RANGE OF FROM 240* C. TO 265* C. AT ATMOSPHERIC PRESSURE, A HYDROXYL NUMBER OF ABOUT 230 AND A STRUCTURE CORRESPONDING TO THE FORMULA
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |