Patent US2730630A successfully refreshed from Google Patents.
US4401439A
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US
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Fuel and lubricant compositions for octane requirement reduction
Assignee: Shell USA Inc
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Filing: 1981-12-31
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Granted: 1983-08-30
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Expires: 2001-12-31
Abstract
Abstract The reduction of octane requirement in a spark ignition, internal combustion engine is achieved by introducing with the combustion intake charge a fuel and/or lubricant composition containing an octane requirement reduction amount of a compound represented by the formula: <IMAGE> where R, R' and R'' are hydrocarbyl groups having from 1 to 3 carbon atoms.
Inventors
- 👤 L. B. Graiff
- 👤 T. E. Kiovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:16
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10L1/232; C10M; C10M133/00; C10M133/02; C10M133/38; C10M133/40; C10M2215/00; C10M2215/22; C10M2215/221; C10M2215/225; C10M2215/226; C10M2215/24; C10M2215/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
60 words
A fuel composition comprising a major portion of hydrocarbons boiling in the gasoline range and incorporating a minor amount of an additive composition which exhibits octane requirement reduction properties, said additive composition comprising a class of substituted urea citrate salts represented by the formula: ##STR5## where R, R' and R" are hydrocarbyl groups having from 1 to 3 carbon atoms.
Claim 2
Dependent Claim
60 words
A fuel composition comprising a major portion of hydrocarbons boiling in the gasoline range and incorporating a minor amount of an additive composition which exhibits octane requirement reduction properties, said additive composition comprising a class of substituted urea citrate salts represented by the formula: ##STR5## where R, R' and R" are hydrocarbyl groups having from 1 to 3 carbon atoms.
Claim 3
Dependent Claim
12 words
The fuel composition of claim 1 wherein the additive composition is: ##STR6##
Claim 4
Dependent Claim
22 words
The fuel compositions of claim 2 wherein an octane requirement reduction amount of said additive composition is incorporated into said fuel composition.
Claim 5
Dependent Claim
27 words
The composition according to claim 3 wherein said additive is present in the fuel composition in the amount of from about 10 to about 3000 ppm weight.
Claim 6
Dependent Claim
23 words
The composition as in claim 4 wherein the additive is present in an amount of from about 50 to about 1000 ppm weight.
Claim 7
Independent Claim
59 words
A method of operating a spark ignition internal combustion engine which comprises burning in said engine a motor fuel comprising a gasoline boiling range hydrocarbon mixture containing an additive composition comprising an octane reduction requirement amount of substituted urea represented by the formula: ##STR7## where R, R' and R" are hydrocarbyl groups having from 1 to 3 carbon atoms.
Claim 8
Independent Claim
59 words
A method of operating a spark ignition internal combustion engine which comprises burning in said engine a motor fuel comprising a gasoline boiling range hydrocarbon mixture containing an additive composition comprising an octane reduction requirement amount of substituted urea represented by the formula: ##STR7## where R, R' and R" are hydrocarbyl groups having from 1 to 3 carbon atoms.
Claim 9
Dependent Claim
11 words
The method in claim 6 wherein the additive composition is: ##STR8##
References Cited (Backward Citations)
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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) | 1986-08-29 | 1987-02-28 | 1987-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-29 | 1991-02-28 | 1991-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-29 | 1995-02-28 | 1995-08-30 | $7700.00 | Window Closed / Lapsed |