Patent US4137035A successfully refreshed from Google Patents.
US4501596A
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Motor fuel
Assignee: Phillips Petroleum Co
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Filing: 1983-12-28
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Granted: 1985-02-26
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Expires: 2003-12-28
Abstract
Abstract Oxazolines, oxazoles and their derivatives blend into gasoline at high octane value.
Inventors
- 👤 Lyle D. Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:45
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/10; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C10L1/233
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
23 words
A gasoline composition containing an antiknock quantity of an additive selected from 1-oxa-3-azacyclopent-2-ene; 1-oxa-3-azacyclopent-3-ene; 1-oxa-3-azacyclopent-4-ene; 1-oxa-3-azacyclopent-2,4-diene and hydrocarbyl substituted derivatives of these compounds.
Claim 2
Dependent Claim
23 words
A gasoline composition containing an antiknock quantity of an additive selected from 1-oxa-3-azacyclopent-2-ene; 1-oxa-3-azacyclopent-3-ene; 1-oxa-3-azacyclopent-4-ene; 1-oxa-3-azacyclopent-2,4-diene and hydrocarbyl substituted derivatives of these compounds.
Claim 3
Dependent Claim
34 words
A gasoline composition containing from about 0.1 to about 20 percent by weight of an additive, wherein the additive is selected from 1-oxa-3-azacyclopent-2-ene; 1-oxa-3-azacyclopent-3-ene; 1-oxa-3-azacyclopent-4-ene; 1-oxa-3-azacyclopent-2,4-diene or a mono, di or trimethyl derivative thereof.
Claim 4
Dependent Claim
34 words
A gasoline composition containing from about 0.1 to about 20 percent by weight of an additive, wherein the additive is selected from 1-oxa-3-azacyclopent-2-ene; 1-oxa-3-azacyclopent-3-ene; 1-oxa-3-azacyclopent-4-ene; 1-oxa-3-azacyclopent-2,4-diene or a mono, di or trimethyl derivative thereof.
Claim 5
Dependent Claim
16 words
A gasoline composition as in claim 2 further characterized by the essential absence of lead compounds.
Claim 6
Dependent Claim
62 words
A gasoline composition containing an antiknock quantity of an additive selected from a material represented by one of the formulas ##STR2## where R is H, hydrocarbyl containing 6 or fewer carbon atoms, or (CH 2 -- n A where n is 0, 1 or 2 and A is the ring residue remaining after removing an R from one of the above formulas.
Claim 7
Dependent Claim
62 words
A gasoline composition containing an antiknock quantity of an additive selected from a material represented by one of the formulas ##STR2## where R is H, hydrocarbyl containing 6 or fewer carbon atoms, or (CH 2 -- n A where n is 0, 1 or 2 and A is the ring residue remaining after removing an R from one of the above formulas.
Claim 8
Dependent Claim
36 words
A gasoline composition as in claim 4 which contains from about 1% to about 10% by weight of said additive, wherein R is H, CH 3 , or branched alkyl containing 4 or fewer carbon atoms.
Claim 9
Dependent Claim
17 words
An unleaded gasoline composition containing from 1 to about 10 percent by weight of 2-methyl-1-oxa-3-azacyclopent-2-ene or 4-methyl-1-oxa-3-azacyclopent-2,4-diene.
Claim 10
Dependent Claim
17 words
An unleaded gasoline composition containing from 1 to about 10 percent by weight of 2-methyl-1-oxa-3-azacyclopent-2-ene or 4-methyl-1-oxa-3-azacyclopent-2,4-diene.
Claim 11
Independent Claim
69 words
A method for improving the antiknock properties of a gasoline composition, said method comprising incorporating into the gasoline composition a sufficient amount of an additive selected from 1-oxa-3-azacyclopent-2-ene; 1-oxa-3-azacyclopent-3-ene; 1-oxa-3-azacyclopent-4-ene; 1-oxa-3-azacyclopent-2,4-diene and hydrocarbyl substituted derivatives of these compounds to reduce the knocking tendencies of the gasoline composition and impart to the gasoline composition a concentration of said additive of at least 1 percent by weight of composition plus additive.
Claim 12
Independent Claim
69 words
A method for improving the antiknock properties of a gasoline composition, said method comprising incorporating into the gasoline composition a sufficient amount of an additive selected from 1-oxa-3-azacyclopent-2-ene; 1-oxa-3-azacyclopent-3-ene; 1-oxa-3-azacyclopent-4-ene; 1-oxa-3-azacyclopent-2,4-diene and hydrocarbyl substituted derivatives of these compounds to reduce the knocking tendencies of the gasoline composition and impart to the gasoline composition a concentration of said additive of at least 1 percent by weight of composition plus additive.
Claim 13
Dependent Claim
57 words
A method as in claim 7 wherein the derivative is formed by methyl substitutions at the 2 and/or 4 positions and the additive is present in an amount sufficient to impart to said composition a concentration of said additive in the range of from about 1 to about 10 percent by total weight of composition and additive.
Claim 14
Dependent Claim
13 words
A method as in claim 8 wherein the additive comprises 2-methyl-1-oxa-3-azacyclopent-2-ene or 4-methyl-1-oxa-3-azacyclopent-2,4-diene.
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) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |