Patent US4028065A successfully refreshed from Google Patents.
US4028065A
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Manganese containing fuels
Assignee: Standard Oil Co
•
Filing: 1974-11-27
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Granted: 1977-06-07
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Expires: 1994-11-27
Abstract
Abstract The invention is gasoline, containing manganese additives, to improve the octane rating of the gasoline and including a hydrocarbon ester of citric acid.
Inventors
- 👤 James W. Sprague
- 👤 Daniel W. Feldman
- 👤 Franklin Veatch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:28
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/19; C10L1/1905; C10L1/30; C10L1/305
Claims Analysis
Total Claims: 46
Claim 1
Independent Claim
32 words
Gasoline containing an added gasoline soluble manganese compound to improve the octane rating of the gasoline and including a small but effective amount of a gasoline soluble hydrocarbon ester of citric acid.
Claim 2
Dependent Claim
32 words
Gasoline containing an added gasoline soluble manganese compound to improve the octane rating of the gasoline and including a small but effective amount of a gasoline soluble hydrocarbon ester of citric acid.
Claim 3
Dependent Claim
48 words
The gasoline of claim 1 wherein the hydrocarbon ester of the citric acid has the formula ##STR3## wherein R 1-4 are independently H or an alkyl, cycloalkyl, phenyl, alkylphenyl or phenylalkyl of up to 10 carbon atoms and wherein at least one of R 2-4 is a hydrocarbon.
Claim 4
Dependent Claim
30 words
The gasoline of claim 2 wherein R 1-4 are independently H or an alkyl of one to four carbon atoms and at least one of R 2-4 is an alkyl.
Claim 5
Dependent Claim
10 words
The gasoline of claim 2 wherein R 1 is hydrogen.
Claim 6
Dependent Claim
14 words
The gasoline of claim 2 wherein at least two of R 2-4 are hydrocarbons.
Claim 7
Dependent Claim
19 words
The gasoline of claim 1 containing 5 to 500 mg. per gallon of the hydrocarbon ester of citric acid.
Claim 8
Dependent Claim
19 words
The gasoline of claim 1 containing 10 to 180 mg. per gallon of the hydrocarbon ester of citric acid.
Claim 9
Dependent Claim
14 words
The gasoline of claim 1 wherein the manganese compound is a cyclopentadienyl manganese tricarbonyl.
Claim 10
Dependent Claim
13 words
The gasoline of claim 8 wherein the manganese compound is methylcyclopentadienyl manganese tricarbonyl.
Claim 11
Dependent Claim
29 words
Gasoline containing an added gasoline soluble manganese compound to improve the octane rating of the gasoline and including a small but effective amount of a gasoline soluble trialkyl citrate.
Claim 12
Dependent Claim
29 words
Gasoline containing an added gasoline soluble manganese compound to improve the octane rating of the gasoline and including a small but effective amount of a gasoline soluble trialkyl citrate.
Claim 13
Dependent Claim
42 words
The gasoline of claim 10 wherein the trialkyl citrate has the formula ##STR4## wherein R 1 is H or an alkyl of up to 10 carbon atoms and wherein R 2-4 are independently an alkyl radical of up to 10 carbon atoms.
Claim 14
Dependent Claim
32 words
The gasoline of claim 11 wherein R 1 is H or an alkyl of one to four carbon atoms and R 2-4 are independently an alkyl of one to four carbon atoms.
Claim 15
Dependent Claim
10 words
The gasoline of claim 11 wherein R 1 is H.
Claim 16
Dependent Claim
18 words
The gasoline of claim 13 wherein R 2-4 are independently an alkyl of one to four carbon atoms.
Claim 17
Dependent Claim
18 words
The gasoline of claim 13 wherein R 2-4 are independently an alkyl of two to four carbon atoms.
Claim 18
Dependent Claim
12 words
The gasoline of claim 10 wherein the trialkyl citrate is triethyl citrate.
Claim 19
Dependent Claim
12 words
The gasoline of claim 10 wherein the trialkyl citrate is tripropyl citrate.
Claim 20
Dependent Claim
12 words
The gasoline of claim 10 wherein the trialkyl citrate is tributyl citrate.
Claim 21
Dependent Claim
21 words
The gasoline of claim 10 wherein the trialkyl citrate is present in the amount of 5 to 500 mg. per gallon.
Claim 22
Dependent Claim
21 words
The gasoline of claim 10 wherein the triethyl citrate is present in the amount of 10 to 180 mg. per gallon.
Claim 23
Dependent Claim
14 words
The gasoline of claim 10 wherein the manganese compound is a cyclopentadienyl manganese tricarbonyl.
Claim 24
Dependent Claim
8 words
Gasoline containing cyclopentadienyl manganese tricarbonyl and triethyl citrate.
Claim 25
Dependent Claim
8 words
Gasoline containing cyclopentadienyl manganese tricarbonyl and triethyl citrate.
Claim 26
Dependent Claim
19 words
The gasoline of claim 22 wherein the concentration of the triethyl citrate is 5 to 500 mg. per gallon.
Claim 27
Dependent Claim
19 words
The gasoline of claim 22 wherein the concentration of the treithyl citrate is 10 to 180 mg. per gallon.
Claim 28
Dependent Claim
27 words
The gasoline of claim 22 wherein the concentration of the cylopentadienyl manganese tricarbonyl measured on the weight of the compound is 0.1 to 5 grams per gallon.
Claim 29
Dependent Claim
27 words
The gasoline of claim 22 wherein the concentration of the cyclopentadienyl manganese tricarbonyl measured on the weight of the compound is 0.2 to 2 grams per gallon.
Claim 30
Dependent Claim
35 words
The gasoline of claim 22 wherein the concentration of the cyclopentadienyl tricarbonyl manganese tricarbonyl is 0.2 to 2 grams per gallon, and the concentration of the triethyl citrate is 10 to 180 mg. per gallon.
Claim 31
Dependent Claim
27 words
An additive package for gasoline comprising a gasoline soluble manganese compound to improve the octane rating of the gasoline and a gasoline soluble ester of citric acid.
Claim 32
Dependent Claim
27 words
An additive package for gasoline comprising a gasoline soluble manganese compound to improve the octane rating of the gasoline and a gasoline soluble ester of citric acid.
Claim 33
Dependent Claim
15 words
The additive package of claim 28 wherein the manganese compound is a cyclopentadienyl manganese tricarbonyl.
Claim 34
Dependent Claim
15 words
The additive package of claim 28 wherein the manganese compound is a methylcyclopentadienyl manganese tricarbonyl.
Claim 35
Dependent Claim
48 words
The additive package of claim 28 wherein the hydrocarbon ester of citric acid has the formula ##STR5## wherein R 1-4 are independently H or an alkyl, cycloalkyl, phenyl, alkylphenyl or phenylalkyl of up to 10 carbon atoms and wherein at least one of R 2-4 is a hydrocarbon.
Claim 36
Dependent Claim
33 words
The additive package of claim 31 wherein R 1 is H, R 2-4 are independently an alkyl of one to four carbon atoms and at least one of R 2-4 is an alkyl.
Claim 37
Dependent Claim
21 words
The additive package of claim 32 wherein each of R 2-4 is independently an alkyl of one to four carbon atoms.
Claim 38
Dependent Claim
25 words
The additive package of claim 28 wherein the weight ratio of the manganese compound to the hydrocarbon ester of citric acid is 50:1 to 1:5.
Claim 39
Dependent Claim
12 words
An additive package for gasoline comprising methylcylcopentadienyl manganese tricarbonyl and triethyl citrate.
Claim 40
Dependent Claim
12 words
An additive package for gasoline comprising methylcylcopentadienyl manganese tricarbonyl and triethyl citrate.
Claim 41
Dependent Claim
21 words
The additive package of claim 35 wherein the weight ratio of methylcyclopentadienyl manganese tricarbonyl to triethyl citrate is 50:1 to 1:5.
Claim 42
Dependent Claim
64 words
In a gasoline composition for combustion in a gasoline internal combustion engine comprising gasoline and a gasoline soluble manganese compound as an additive, the improvement comprising including a small but effective amount of a citrate compound having at least one alkyl group, said compound being soluble in gasoline and acting as a gasoline additive to improve the performance of the gasoline internal combustion engine.
Claim 43
Dependent Claim
64 words
In a gasoline composition for combustion in a gasoline internal combustion engine comprising gasoline and a gasoline soluble manganese compound as an additive, the improvement comprising including a small but effective amount of a citrate compound having at least one alkyl group, said compound being soluble in gasoline and acting as a gasoline additive to improve the performance of the gasoline internal combustion engine.
Claim 44
Dependent Claim
17 words
The composition of claim 37 wherein the alkyl citrate has an alkyl group of 2-4 carbon atoms.
Claim 45
Dependent Claim
12 words
The composition of claim 37 wherein the alkyl citrate is triethyl citrate.
Claim 46
Dependent Claim
14 words
The composition of claim 37 wherein the manganese compound is methyl cyclopentadienyl manganese tricarbonyl.
References Cited (Backward Citations)
US1995615A
Cited
US2948744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |