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US4444567A
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Motor fuel composition containing an ashless antiknock agent
Assignee: Phillips Petroleum Co
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Filing: 1983-03-31
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Granted: 1984-04-24
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Expires: 2003-03-31
Abstract
Abstract Liquid hydrocarbon fuel compositions are provided containing antiknock quantities of ashless antiknock agents comprising selected alkoxy-substituted benzaldehydes and alkoxy-substituted benzoic esters.
Inventors
- 👤 Lyle D. Burns
- 👤 Robert M. Parlman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:28
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/185; C10L1/1857; C10L1/19
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
72 words
An internal combustion fuel composition comprising a liquid hydrocarbon motor fuel containing a small but effective amount, sufficient to impart reduced knocking tendencies to said motor fuel, of at least one ashless antiknock additive characterized by the formulae: ##STR3## wherein each R can be the same or different and is a straight or branched chain alkyl substituent having from 1 to 4, inclusive, carbon atoms and n is 0, 1, or 2.
Claim 2
Dependent Claim
72 words
An internal combustion fuel composition comprising a liquid hydrocarbon motor fuel containing a small but effective amount, sufficient to impart reduced knocking tendencies to said motor fuel, of at least one ashless antiknock additive characterized by the formulae: ##STR3## wherein each R can be the same or different and is a straight or branched chain alkyl substituent having from 1 to 4, inclusive, carbon atoms and n is 0, 1, or 2.
Claim 3
Dependent Claim
16 words
A composition according to claim 1 wherein said additive is an alkoxy-substituted benzaldehyde having formula (a).
Claim 4
Dependent Claim
14 words
A composition according to claim 2 wherein said additive is p-anisaldehyde, m-anisaldehyde, or o-anisaldehyde.
Claim 5
Dependent Claim
27 words
A composition according to claim 1 wherein the motor fuel contains from about 0.5 to about 15 wt. % of said additive based on total fuel composition.
Claim 6
Dependent Claim
25 words
A composition according to claim 1 wherein said motor fuel is a distillate boiling in the range of about 70° F. to about 420° F.
Claim 7
Dependent Claim
15 words
A composition according to claim 1 wherein said motor fuel is unleaded gasoline containing p-anisaldehyde.
Claim 8
Dependent Claim
24 words
A composition according to claim 6 wherein p-anisaldehyde is present in said gasoline in the range of about 0.5 to about 15 wt. %.
Claim 9
Dependent Claim
18 words
A composition according to claim 1 wherein said additive is an alkoxy-substituted benzoic acid ester having formula (b).
Claim 10
Dependent Claim
19 words
A composition according to claim 8 wherein said additive is ethyl 4-ethoxybenzoate, methyl 4-ethoxybenzoate, methyl 4-methoxybenzoate, or ethyl 4-methoxybenzoate.
Claim 11
Dependent Claim
16 words
A composition according to claim 1 wherein said motor fuel is unleaded gasoline containing methyl p-methoxybenzoate.
Claim 12
Dependent Claim
25 words
A composition according to claim 10 wherein said additive is present in said gasoline in the range of about 0.5 to about 15 weight percent.
Claim 13
Independent Claim
75 words
A method for improving the antiknock properties of a motor fuel which comprises incorporating therein a small but effective amount sufficient to impart reduced knocking tendencies to said motor fuel of at least one ashless antiknock additive characterized by the formulae: ##STR4## wherein each R can be the same or different and is a straight or branched chain alkyl substituent having from 1 to 4, inclusive, carbon atoms and n is 0, 1, or 2.
Claim 14
Independent Claim
75 words
A method for improving the antiknock properties of a motor fuel which comprises incorporating therein a small but effective amount sufficient to impart reduced knocking tendencies to said motor fuel of at least one ashless antiknock additive characterized by the formulae: ##STR4## wherein each R can be the same or different and is a straight or branched chain alkyl substituent having from 1 to 4, inclusive, carbon atoms and n is 0, 1, or 2.
Claim 15
Dependent Claim
25 words
A method according to claim 12 wherein said motor fuel is unleaded and contains from about 0.5 to about 15 weight percent of the additive.
Claim 16
Dependent Claim
18 words
A method according to claim 12 wherein said motor fuel is unleaded gasoline and said additive is p-anisaldehyde.
Claim 17
Dependent Claim
14 words
A method according to claim 12 wherein said additive is p-anisaldehyde, m-anisaldehyde, or o-anisaldehyde.
Claim 18
Dependent Claim
19 words
A method according to claim 12 wherein said additive is ethyl 4-ethoxybenzoate, methyl 4-ethoxybenzoate, methyl 4-methoxybenzoate, or ethyl 4-methoxybenzoate.
Claim 19
Dependent Claim
19 words
A method according to claim 12 wherein said motor fuel is unleaded gasoline and said additive is ethyl 4-methoxybenzoate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-24 | 1987-10-24 | 1988-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-24 | 1991-10-24 | 1992-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-24 | 1995-10-24 | 1996-04-24 | $7700.00 | Window Closed / Lapsed |