US3752657A
Expired / Lapsed
US
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Nonionic surfactant as a demulsifier for amine containing fuel detergents
Assignee: Chevron USA Inc
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Filing: 1971-04-26
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Granted: 1973-08-14
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Expires: 1991-04-26
Abstract
Abstract DISTILLATE FUELS HAVING HYDROCARBON POLYAMINE FUEL DETERGENTS IN COMBINATION WITH A POLYALKYLENE MODIFIED METHYLENE BRIDGED POLY(ALKYLPHENOL) HAVE IMPROVED WATER TOLERANCE.
Inventors
- 👤 W Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:52
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/143; C10L1/18; C10L1/192; C10L1/198; C10L1/1985; C10L1/22; C10L1/234; C10L1/238; C10L1/2383
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 |