Patent US4674447A successfully refreshed from Google Patents.
US4674447A
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Prevention of fouling in internal combustion engines and their exhaust systems and improved gasoline compositions
Assignee: Ethyl Corp
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Filing: 1980-05-27
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Granted: 1987-06-23
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Expires: 2000-05-27
Abstract
Abstract Processes for operating gasoline engines with spark plug ignition of gasolines containing manganese compound additives such as pentadienyl manganese tricarbonyl (MMT), the gasoline being essentially free of lead, sodium and barium compounds, thereby avoiding fouling of the spark plugs with glass-like deposits formed from the oxide reaction products of sodium or barium and manganese; the lubricating oils in the crankcase of said engines being essentially free from lead, sodium and barium compounds; processes for operating gasoline engines having an exhaust system with a catalytic converter for conversion of hydrocarbon emissions and carbon monoxide emissions to water and carbon dioxide with the same types of gasolines, and preventing fouling of the catalyst in said converter by glass-like deposits formed thereon by oxidation products of sodium and/or barium compounds with manganese by operating said engine in the absence of lead, sodium and barium compounds in the combustion chambers of the engine, its exhaust system, and the crankcase lubricating oils; and gasoline fuels for internal combustion engines containing a small amount of a manganese compound additive, e.g., MMT, said gasoline being essentially free of lead, sodium and barium compounds.
Inventors
- 👤 Robert E. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:17
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/10; C10L1/00; C10L1/10; C10L1/14; C10L1/30; C10L1/305; C10L10/02; C10L10/04
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
72 words
A process for operating gasoline engines with spark plug ignition which use a gasoline fuel containing methylcyclopentadienyl manganese tricarbonyl which comprises: using as the gasoline fuel for said engines a gasoline containing methylcyclopentadienyl manganese tricarbonyl as an octane improver but containing no additives which include sodium or barium compounds; whereby fouling of the spark plugs with glass-like deposits formed from the oxidation reaction products of sodium and/or barium and manganese is avoided.
Claim 2
Dependent Claim
72 words
A process for operating gasoline engines with spark plug ignition which use a gasoline fuel containing methylcyclopentadienyl manganese tricarbonyl which comprises: using as the gasoline fuel for said engines a gasoline containing methylcyclopentadienyl manganese tricarbonyl as an octane improver but containing no additives which include sodium or barium compounds; whereby fouling of the spark plugs with glass-like deposits formed from the oxidation reaction products of sodium and/or barium and manganese is avoided.
Claim 3
Dependent Claim
26 words
A process as claimed in claim 1 wherein the lubricating oil in the crankcase of said engine contains no additives which include sodium and barium compounds.
Claim 4
Dependent Claim
32 words
A process as claimed in claim 2 wherein the amount of sodium and barium compounds in said lubricating oil and in said gasoline is less than 30 ppm, as Na and Ba.
Claim 5
Dependent Claim
27 words
A process as claimed in claim 1 wherein the amount of sodium and barium compounds in said gasoline is less than 30 ppm, as Na and Ba.
Claim 6
Dependent Claim
81 words
A process for operating gasoline engines having exhaust system s with catalytic converter s for conversion of hydrocarbon emissions and carbon monoxide emissions to water and carbon dioxide while preventing fouling and plugging of the catalyst in said converters by glass-like deposits formed thereon by oxidation products of sodium and/or barium with manganese' which comprises operating said engines using as the fuel gasoline containing methylcyclopentadienyl manganese tricarbonyl as an octane enhancer but containing no additives which include sodium or barium compounds.
Claim 7
Dependent Claim
81 words
A process for operating gasoline engines having exhaust system s with catalytic converter s for conversion of hydrocarbon emissions and carbon monoxide emissions to water and carbon dioxide while preventing fouling and plugging of the catalyst in said converters by glass-like deposits formed thereon by oxidation products of sodium and/or barium with manganese' which comprises operating said engines using as the fuel gasoline containing methylcyclopentadienyl manganese tricarbonyl as an octane enhancer but containing no additives which include sodium or barium compounds.
Claim 8
Dependent Claim
26 words
A process as claimed in claim 5 wherein the lubricating oil in the crankcase of said engine contains no additives which include sodium and barium compounds.
Claim 9
Dependent Claim
32 words
A process as claimed in claim 6 wherein the amount of sodium and barium compounds in said lubricating oil and in said gasoline is less than 30 ppm, as Na and Ba.
Claim 10
Dependent Claim
27 words
A process as claimed in claim 5 wherein the amount of sodium and barium compounds in said gasoline is less than 30 ppm, as Na and Ba.
Claim 11
Dependent Claim
34 words
A gasoline fuel for internal combustion engines which comprises gasoline containing methylcyclopentadienyl manganese tricarbonyl as an octane improver; said gasoline being free of lead compounds and free of additives containing sodium and barium compounds.
Claim 12
Dependent Claim
34 words
A gasoline fuel for internal combustion engines which comprises gasoline containing methylcyclopentadienyl manganese tricarbonyl as an octane improver; said gasoline being free of lead compounds and free of additives containing sodium and barium compounds.
Claim 13
Dependent Claim
25 words
A gasoline fuel as claimed in claim 9 wherein said gasoline contains less than 30 ppm of sodium and barium compounds, as Na and Ba.
Claim 14
Dependent Claim
63 words
A process for operating gasoline engines with spark plug ignition which use gasoline containing a manganese compound additive which comprises; using as the gasoline fuel for said engines a gasoline containing a manganese compound additives containing sodium and barium compounds, whereby fouling of the spark plugs with glass-like deposits formed from the oxidation reaction products of sodium and/or barium and manganese is avoided.
Claim 15
Dependent Claim
63 words
A process for operating gasoline engines with spark plug ignition which use gasoline containing a manganese compound additive which comprises; using as the gasoline fuel for said engines a gasoline containing a manganese compound additives containing sodium and barium compounds, whereby fouling of the spark plugs with glass-like deposits formed from the oxidation reaction products of sodium and/or barium and manganese is avoided.
Claim 16
Dependent Claim
26 words
A process as claimed in claim 11 wherein the lubricating oil in the crankcase of said engine contains no additives which include sodium and barium compounds.
Claim 17
Dependent Claim
27 words
A process as claimed in claim 11 wherein the amount of sodium and barium compounds in said gasoline is less than 30 ppm, as Na and Ba.
Claim 18
Dependent Claim
82 words
A process for operating gasoline engines having exhaust system s with catalytic converter s for conversion of hydrocarbon emissions and carbon monoxide emissions to water and carbon dioxide while preventing fouling and plugging of the catalyst in said converters by glass-like deposits formed thereon by oxidation products of sodium and/or barium with manganese; which comprises operating said engines using as the fuel gasoline containing a manganese compound additive as an octane enhancer but containing no additives which include sodium or barium compounds.
Claim 19
Dependent Claim
82 words
A process for operating gasoline engines having exhaust system s with catalytic converter s for conversion of hydrocarbon emissions and carbon monoxide emissions to water and carbon dioxide while preventing fouling and plugging of the catalyst in said converters by glass-like deposits formed thereon by oxidation products of sodium and/or barium with manganese; which comprises operating said engines using as the fuel gasoline containing a manganese compound additive as an octane enhancer but containing no additives which include sodium or barium compounds.
Claim 20
Dependent Claim
26 words
A process as claimed in claim 14 wherein the lubricating oil in the crankcase of said engine contains no additives which include sodium and barium compounds.
Claim 21
Dependent Claim
27 words
A process as claimed in claim 14 wherein the amount of sodium and barium compounds in said gasoline is less than 30 ppm, as Na and Ba.
Claim 22
Dependent Claim
45 words
A gasoline fuel for internal combustion engines which comprises gasoline containing a manganese compound additive in an amount providing at least 1/32 gram Mn per gallon of gasoline, and said gasoline being free of lead compounds and free of additives containing sodium and barium compounds.
Claim 23
Dependent Claim
45 words
A gasoline fuel for internal combustion engines which comprises gasoline containing a manganese compound additive in an amount providing at least 1/32 gram Mn per gallon of gasoline, and said gasoline being free of lead compounds and free of additives containing sodium and barium compounds.
Claim 24
Dependent Claim
25 words
A gasoline fuel as claimed in claim 17 wherein said gasoline contains less than 30 ppm of sodium and barium compounds, as Na and Ba.
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) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |