US4032303A
Expired / Lapsed
US
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Fuel compositions containing esters and ester-type dispersants
Assignee: Lubrizol Corp
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Filing: 1975-10-01
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Granted: 1977-06-28
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Expires: 1995-10-01
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 which is either (1) an ester of a polyol and a C 5 -C 15 monocarboxylic acid or (2) an alkanol ester of a substituted succinic acid, and an oil-soluble, ester-type, nitrogen-free dispersant derived from a polyhydric alcohol and characterized by the presence therein of a substantially saturated aliphatic hydrocarbon-based radical having at least about 30 carbon atoms.
Inventors
- 👤 Casper John Dorer, Jr.
- 👤 Clark Ober Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:31
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/19; C10L1/192; C10L1/198
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
101 words
A fuel composition comprising: a major amount of (A) a normally liquid fuel and, dissolved therein, the combination of: (B) about 50-500 parts by weight, per million parts of component A, of at least one ester, containing about 30-80 carbon atoms, of an alkanol and an alkyl-based succinic or alkenyl-based succinic acid; and (C) about 80-400 parts, per million parts of component A, of at least one oil-soluble, nitrogen-free dispersant which is an ester of a polyhydric alcohol and a carboxylic acid which has within its molecular structure a substantially saturated aliphatic hydrocarbon-based radical containing at least about 30 carbon atoms.
Claim 2
Dependent Claim
101 words
A fuel composition comprising: a major amount of (A) a normally liquid fuel and, dissolved therein, the combination of: (B) about 50-500 parts by weight, per million parts of component A, of at least one ester, containing about 30-80 carbon atoms, of an alkanol and an alkyl-based succinic or alkenyl-based succinic acid; and (C) about 80-400 parts, per million parts of component A, of at least one oil-soluble, nitrogen-free dispersant which is an ester of a polyhydric alcohol and a carboxylic acid which has within its molecular structure a substantially saturated aliphatic hydrocarbon-based radical containing at least about 30 carbon atoms.
Claim 3
Dependent Claim
38 words
A composition according to claim 1 wherein component B is a liquid ester of an alkyl succinic or alkenyl succinic acid in which the alkyl or alkenyl group contains about 10-20 carbon atoms and a C 10-20 alkanol.
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
27 words
A composition according to claim 1 wherein component C is an ester of a succinic acid containing a hydrocarbon-based substituent having at least about 50 carbon atoms.
Claim 7
Dependent Claim
11 words
A composition according to claim 5 wherein component A is gasoline.
Claim 8
Dependent Claim
13 words
A composition according to claim 6 wherein component C is a pentaerythritol ester.
Claim 9
Dependent Claim
19 words
A composition according to claim 7 wherein the hydrocarbon-based substituent of component C is derived from an olefin polymer.
Claim 10
Dependent Claim
12 words
A composition according to claim 8 wherein the olefin polymer is polyisobutene.
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 |