US2923724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of preparing ester type anionic surface active agents
Assignee: GAF Chemicals Corp
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Filing: 1956-08-10
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Granted: 1960-02-02
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Expires: 1976-08-10
Abstract
No abstract record available.
Inventors
- 👤 Robert J Anderson
- 👤 Leslie M Schenck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:05
CPC Classifications
C; C07; C07C; C07C309/00; C11; C11D; C11D1/00; C11D1/02; C11D1/12; C11D1/126
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
THE PROCESS OF PREPARING ESTER TYPE ANIONIC SURFACE ACTIVE AGENTS WHICH COMPRISES HEATING AT A TEMPERATURE OF 185-300*C. IN THE PRESENCE OF AN INERT ATMOSPHERE, SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE, NITROGEN, STEAM, SATURATED STEAM AND SUPERHEATED STEAM, AND ALSO OF A PHOSPHORUS CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF O-PHOSPHORIC ACID, M-PHOSPHORIC ACID, HYPOPHOSPHORIC ACID, PHOSPHORUS ACID AND SODIUM DIHYDROGEN PHOSPHATE AS A CATALYST AND TO MAINTAIN THE PH FROM 2.8 TO 3.2, 1 TO 10 MOLES OF MONOCARBOXYLIC FATTY ACID OF FROM 8 TO 22 CARBON ATOMS WITH 1 MOLE OF A 2-HYDROXYALKANE SULFONIC ACID HAVING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
104 words
THE PROCESS OF PREPARING ESTER TYPE ANIONIC SURFACE ACTIVE AGENTS WHICH COMPRISES HEATING AT A TEMPERATURE OF 185-300*C. IN THE PRESENCE OF AN INERT ATMOSPHERE, SELECTED FROM THE GROUP CONSISTING OF CARBON DIOXIDE, NITROGEN, STEAM, SATURATED STEAM AND SUPERHEATED STEAM, AND ALSO OF A PHOSPHORUS CONTAINING COMPOUND SELECTED FROM THE GROUP CONSISTING OF O-PHOSPHORIC ACID, M-PHOSPHORIC ACID, HYPOPHOSPHORIC ACID, PHOSPHORUS ACID AND SODIUM DIHYDROGEN PHOSPHATE AS A CATALYST AND TO MAINTAIN THE PH FROM 2.8 TO 3.2, 1 TO 10 MOLES OF MONOCARBOXYLIC FATTY ACID OF FROM 8 TO 22 CARBON ATOMS WITH 1 MOLE OF A 2-HYDROXYALKANE SULFONIC ACID HAVING THE FOLLOWING FORMULA:
References Cited (Backward Citations)
US2093576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |