US4032304A
Expired / Lapsed
US
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Fuel compositions containing esters and nitrogen-containing dispersants
Assignee: Lubrizol Corp
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Filing: 1974-09-03
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Granted: 1977-06-28
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Expires: 1994-09-03
Abstract
Abstract Improved fuel compositions with decreased tendency to form deposits in the carburetor and on "early fuel evaporation" heating elements, inlet valves and the like contain a normally liquid fuel (usually a hydrocarbon fuel), a carboxylic acid ester of lubricating viscosity, and an oil-soluble nitrogen-containing dispersant. The dispersant is characterized by the presence therein of a substantially saturated hydrocarbon-based radical having at least about 50 carbon atoms, and it is preferably a carboxylic dispersant (e.g., the reaction product of a polyisobutenyl succinic acid-producing compound with a polyethylene polyamine) or a Mannich-type dispersant (e.g., the reaction product of an alkyl phenol with formaldehyde and a polyethylene polyamine).
Inventors
- 👤 Casper John Dorer, Jr.
- 👤 Clark Ober Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:34
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/143; C10L1/18; C10L1/19; C10L1/192; C10L1/198; C10L1/22; C10L1/221; C10L1/234; C10L1/238
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
78 words
A fuel composition comprising a major amount of (A) a normally liquid fuel and a minor dispersant amount of the combination of; (B) at least one liquid ester of a C 10-20 alkanol and an alkyl succinic or alkenyl succinic acid in which the alkyl or alkenyl group contains about 10-20 carbon atoms; and (C) an oil soluble nitrogen-containing dispersant having within its molecular structure a substantially saturated aliphatic hydrocarbon-based radical having at least about 50 carbon atoms.
Claim 2
Dependent Claim
78 words
A fuel composition comprising a major amount of (A) a normally liquid fuel and a minor dispersant amount of the combination of; (B) at least one liquid ester of a C 10-20 alkanol and an alkyl succinic or alkenyl succinic acid in which the alkyl or alkenyl group contains about 10-20 carbon atoms; and (C) an oil soluble nitrogen-containing dispersant having within its molecular structure a substantially saturated aliphatic hydrocarbon-based radical having at least about 50 carbon atoms.
Claim 3
Dependent Claim
23 words
A composition according to claim 1 wherein component C is selected from the group consisting of carboxylic dispersants, Mannich-type dispersants and amine dispersants.
Claim 4
Dependent Claim
11 words
A composition according to claim 2 wherein component A is gasoline.
Claim 5
Dependent Claim
12 words
A composition according to claim 3 wherein the alkanol is tridecyl alcohol.
Claim 6
Dependent Claim
13 words
A composition according to claim 2 wherein component C is a carboxylic dispersant.
Claim 7
Dependent Claim
11 words
A composition according to claim 5 wherein component A is gasoline.
Claim 8
Dependent Claim
41 words
A composition according to claim 6 wherein component C is the reaction products of a succinic acid-producing compound containing a hydrocarbon-based substituent having at least about 50 carbon atoms and a nitrogen reagent comprising an alkylene polyamine or hydroxy-alkyl-substituted alkylene polyamine.
Claim 9
Dependent Claim
24 words
A composition according to claim 7 wherein the nitrogen reagent is an ethylene polyamine containing from 2 to about 8 amino groups per molecule.
Claim 10
Dependent Claim
16 words
A composition according to claim 8 wherein the hydrocarbon-based substituent is derived from an olefin polymer.
Claim 11
Dependent Claim
12 words
A composition according to claim 9 wherein the olefin polymer is polyisobutene.
Claim 12
Dependent Claim
13 words
A composition according to claim 2 wherein component C is a Mannich-type dispersant.
Claim 13
Dependent Claim
11 words
A composition according to claim 11 wherein component A is gasoline.
Claim 14
Dependent Claim
43 words
A composition according to claim 12 wherein component C is prepared by the reaction of formaldehyde, an alkylene polyamine and a phenol containing a hydrocarbon-based substituent having at least about 50 carbon atoms and derived from a polymer of propylene, 1-butene or isobutene.
Claim 15
Dependent Claim
16 words
A composition according to claim 13 wherein the hydrocarbon-based substituent is prepared from an isobutene polymer.
Claim 16
Dependent Claim
24 words
A composition according to claim 14 wherein the alkylene polyamine is an ethylene polyamine containing from 2 to about 8 amino groups per molecule.
Claim 17
Dependent Claim
13 words
A composition according to claim 2 wherein component C is an amine dispersant.
Claim 18
Dependent Claim
11 words
A composition according to claim 16 wherein component A is gasoline.
Claim 19
Dependent Claim
30 words
A composition according to claim 17 wherein component C is the reaction product of an aliphatic or alicyclic halide containing at least about 50 carbon atoms and an alkylene polyamine.
Claim 20
Dependent Claim
32 words
A composition according to claim 18 wherein component C is prepared by the reaction of a chlorinated polyisobutene with an ethylene polyamine containing from 2 to about 8 amino groups per molecule.
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) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |