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Patent US4511367A successfully refreshed from Google Patents.
US4511367A
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Corrosion inhibitors for alcohol containing motor fuel
Assignee: Ethyl Corp
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Filing: 1984-06-13
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Granted: 1985-04-16
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Expires: 2004-06-13
Abstract
Abstract Corrosion caused by gasohol or alcohol motor fuels is inhibited by the addition of a corrosion inhibiting amount of the combination of (A) at least one monoalkenylsuccinic acid wherein the alkenyl group contains about 8 to 30 carbon atoms and (B) a substituted imidazoline, e.g., 2-heptadecenyl-1-(2-hydroxyethyl)imidazoline.
Inventors
- 👤 Gordon G. Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:55
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/188; C10L1/1881; C10L1/1883; C10L1/22; C10L1/232
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
87 words
A liquid fuel adapted for use in an internal combustion engine, said fuel consisting essentially of 5 to 100 weight percent of one or more alcohols, 0 to 95 weight percent gasoline and a corrosion inhibiting amount of a combination of (A) at least one substituted imidazoline having the structural formula: ##STR3## in which R is a hydrocarbon alkenyl group having from about 7 to 24 carbon atoms and (B) at least one monoalkenylsuccinic acid in which the alkenyl group contains about 8 to 30 carbon atoms.
Claim 2
Dependent Claim
87 words
A liquid fuel adapted for use in an internal combustion engine, said fuel consisting essentially of 5 to 100 weight percent of one or more alcohols, 0 to 95 weight percent gasoline and a corrosion inhibiting amount of a combination of (A) at least one substituted imidazoline having the structural formula: ##STR3## in which R is a hydrocarbon alkenyl group having from about 7 to 24 carbon atoms and (B) at least one monoalkenylsuccinic acid in which the alkenyl group contains about 8 to 30 carbon atoms.
Claim 3
Dependent Claim
12 words
A liquid fuel of claim 1 wherein said substituted imidazoline is 2-heptadecenyl-1-(hydroxyethyl)imidazoline.
Claim 4
Dependent Claim
13 words
A liquid fuel of claim 2 wherein said monoalkenylsuccinic acid is dodecenylsuccinic acid.
Claim 5
Dependent Claim
65 words
A corrosion inhibiting concentrate consisting essentially of a solvent containing 5 to 60 weight percent of a combination of (A) at least one substituted imidazoline having the structural formula ##STR4## in which R is a hydrocarbon alkenyl group having from about 7 to 24 carbon atoms and (B) at least one monoalkenylsuccinic acid in which the alkenyl group contains about 8 to 30 carbon atoms.
Claim 6
Dependent Claim
65 words
A corrosion inhibiting concentrate consisting essentially of a solvent containing 5 to 60 weight percent of a combination of (A) at least one substituted imidazoline having the structural formula ##STR4## in which R is a hydrocarbon alkenyl group having from about 7 to 24 carbon atoms and (B) at least one monoalkenylsuccinic acid in which the alkenyl group contains about 8 to 30 carbon atoms.
Claim 7
Dependent Claim
14 words
A corrosion inhibiting concentrate of claim 4 in which said substituted imidazoline is 2-heptadecenyl-1-(hydroxyethyl)-imidazoline.
Claim 8
Dependent Claim
13 words
A corrosion inhibiting concentrate of claim 5 wherein monoalkenylsuccinic acid is dodecenylsuccinic acid.
Claim 9
Dependent Claim
106 words
A liquid fuel adapted for use in an internal combustion engine, said fuel consisting essentially of a major amount of a hydrocarbon distillate in the gasoline distillation range and from about 2 to about 30 volume percent of one or more alkanols containing from abut 1 to about 4 carbon atoms and a corrosion inhibiting amount of a combination of (A) at least one substituted imidazoline having the structural formula ##STR5## in which R is a hydrocarbon alkenyl group having from about 7 to 24 carbon atoms and (B) at least one monoalkenylsuccinic acid in which the alkenyl group has about 8 to 30 carbon atoms.
Claim 10
Dependent Claim
106 words
A liquid fuel adapted for use in an internal combustion engine, said fuel consisting essentially of a major amount of a hydrocarbon distillate in the gasoline distillation range and from about 2 to about 30 volume percent of one or more alkanols containing from abut 1 to about 4 carbon atoms and a corrosion inhibiting amount of a combination of (A) at least one substituted imidazoline having the structural formula ##STR5## in which R is a hydrocarbon alkenyl group having from about 7 to 24 carbon atoms and (B) at least one monoalkenylsuccinic acid in which the alkenyl group has about 8 to 30 carbon atoms.
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) | 1988-04-15 | 1988-10-15 | 1989-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-15 | 1992-10-15 | 1993-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-15 | 1996-10-15 | 1997-04-16 | $7700.00 | Window Closed / Lapsed |