US3752857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonionic surfactant with low pour point
Assignee: Texaco Inc
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Filing: 1970-04-27
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Granted: 1973-08-14
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Expires: 1990-04-27
Abstract
Abstract NONIONIC SURFACE-ACTIVE AGENTS PREPARED BY THE ADDITION OF ETHYLENE OXIDE TO MIXTURES OF ALCOHOLS CONTAINING FROM 8 TO 20 CARBON ATOMS ARE OFTEN SOLIDS OR MIXTURES OF SOLIDS AND LIQUIDS AT ROOM TEMPERATURES. THE POUR POINTS OF SUCH NONIONIC SURFACTANTS CAN BE LOWERED WITHOUT APPRECIABLY ADVERSELY AFFECTING OTHER PROPERTIES BY THE SEQUENTIAL ADDITION OF ETHYLENE OXIDE, PROPYLENE OXIDE AND ETHYLENE OXIDE TO THE ALCOHOL IF THE INITIAL OXYETHYLENE BLOCK CONTAINS FROM 30% TO 60% OF THE TOTAL OXYETHYLENE GROUPS IN THE MOLECULE.
Inventors
- 👤 J Milligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:08
CPC Classifications
C; C11; C11D; C11D1/00; C11D1/66; C11D1/722
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |