US4067699A
Expired / Lapsed
US
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Fuel composition
Assignee: Union Oil Company of California
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Filing: 1976-12-17
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Granted: 1978-01-10
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Expires: 1996-12-17
Abstract
Abstract Gasoline compositions containing methylcyclopentadienylmanganesetricarbonyl (hereinafter MCMT) are stabilized against oxidation by the addition of 2-ethylhexanoic acid.
Inventors
- 👤 Ronald J. Lukasiewicz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:12
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/188; C10L1/1881; C10L1/30; C10L1/305
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
49 words
A gasoline composition suitable for use as a fuel for internal combustion engines comprising a major proportion of gasoline, methylcyclopentadienylmanganesetricarbonyl in a proportion at least sufficient to increase the octane rating of the gasoline, and 2-ethylhexanoic acid in a proportion at least sufficient to inhibit oxidation of said methylcyclopentadienylmanganesetricarbonyl.
Claim 2
Dependent Claim
49 words
A gasoline composition suitable for use as a fuel for internal combustion engines comprising a major proportion of gasoline, methylcyclopentadienylmanganesetricarbonyl in a proportion at least sufficient to increase the octane rating of the gasoline, and 2-ethylhexanoic acid in a proportion at least sufficient to inhibit oxidation of said methylcyclopentadienylmanganesetricarbonyl.
Claim 3
Dependent Claim
38 words
A composition as defined in claim 1 wherein said composition contains said methylcyclopentadienylmanganesetricarbonyl in a proportion between about 0.05 and 0.20 gm/gal (as manganese) and said 2-ethylhexanoic acid in a proportion of at least about 0.05 volume percent.
Claim 4
Dependent Claim
23 words
A composition as defined in claim 2 wherein said 2-ethylhexanoic acid is present in a proportion between about 0.1 and 3.0 volume percent.
Claim 5
Dependent Claim
23 words
A composition as defined in claim 3 wherein said 2-ethylhexanoic acid is present in a proportion between about 0.5 and 2.0 volume percent.
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) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |