US4264335A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suppressing the octane requirement increase of an automobile engine
Assignee: Chevron USA Inc
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Filing: 1979-10-15
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Granted: 1981-04-28
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Expires: 1999-10-15
Abstract
Abstract The octane requirement increase of a gasoline fired internal combustion engine is suppressed by the incorporation in the gasoline fed to the engine of a minor amount of cerium (III) or cerium (IV) 2-ethylhexanoate.
Inventors
- 👤 Charles Bello
- 👤 Robert J. Hartle
- 👤 Gary M. Singerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:44
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/10; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/188; C10L1/1881; C10L1/30; C10L1/305; C10L1/306
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
53 words
A gasoline motor fuel composition comprising a major amount of gasoline and in solution between about 0.05 and about ten grams of the cerium (III) or cerium (IV) salt of 2-ethylhexanoic acid per gallon of gasoline whereby the octane requirement increase of an internal combustion engine using the motor fuel composition is suppressed.
Claim 2
Dependent Claim
53 words
A gasoline motor fuel composition comprising a major amount of gasoline and in solution between about 0.05 and about ten grams of the cerium (III) or cerium (IV) salt of 2-ethylhexanoic acid per gallon of gasoline whereby the octane requirement increase of an internal combustion engine using the motor fuel composition is suppressed.
Claim 3
Dependent Claim
15 words
The gasoline motor fuel composition of claim 1 wherein the cerium salt is cerous 2-ethylhexanoate.
Claim 4
Dependent Claim
32 words
The gasoline motor fuel composition of claim 1 wherein the cerium (III) or cerium (IV) 2-ethylhexanoate is present in an amount between about 0.2 and about two grams per gallon of gasoline.
Claim 5
Dependent Claim
73 words
In a method of operating a gasoline powered internal combustion engine which exhibits a tendency of requiring progressively increasing octane fuel with use, the improvement which comprises combusting a gasoline in said internal combustion engine which contains in solution between about 0.05 and about ten grams of the cerium (III) or cerium (IV) salt of 2-ethylhexanoic acid per gallon of gasoline whereby the octane requirement increase of the internal combustion engine is suppressed.
Claim 6
Dependent Claim
73 words
In a method of operating a gasoline powered internal combustion engine which exhibits a tendency of requiring progressively increasing octane fuel with use, the improvement which comprises combusting a gasoline in said internal combustion engine which contains in solution between about 0.05 and about ten grams of the cerium (III) or cerium (IV) salt of 2-ethylhexanoic acid per gallon of gasoline whereby the octane requirement increase of the internal combustion engine is suppressed.
Claim 7
Dependent Claim
23 words
A method of operating a gasoline powered internal combustion engine in accordance with claim 4 in which the cerium salt is cerous 2-ethylhexanoate.
Claim 8
Dependent Claim
40 words
In a method of operating a gasoline powered internal combustion engine in accordance with claim 4 wherein the cerium (III) or cerium (IV) 2-ethylhexanoate is present in an amount between about 0.2 and about two grams per gallon of gasoline.
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) | 1984-04-27 | 1984-10-27 | 1985-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-04-27 | 1988-10-27 | 1989-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-04-27 | 1992-10-27 | 1993-04-28 | $7700.00 | Window Closed / Lapsed |