Patent US4602919A successfully refreshed from Google Patents.
US4602919A
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Gasoline compositions containing malonates
Assignee: Union Oil Company of California
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Filing: 1985-04-29
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Granted: 1986-07-29
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Expires: 2005-04-29
Abstract
Abstract A fuel composition containing a malonate as an anti-knock additive.
Inventors
- 👤 Peter J. Jessup
- 👤 Stephen G. Brass
- 👤 Michael C. Croudace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:25
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/10; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/19; C10L1/1905
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
46 words
A composition comprising a major amount of a liquid hydrocarbon base fuel and an anti-knock enhancing amount of the compound of the formula: ##STR3## wherein R and R' are the same or different C 1 to C 10 substituted or unsubstituted alkyl, alkenyl or alkynyl radical.
Claim 2
Dependent Claim
46 words
A composition comprising a major amount of a liquid hydrocarbon base fuel and an anti-knock enhancing amount of the compound of the formula: ##STR3## wherein R and R' are the same or different C 1 to C 10 substituted or unsubstituted alkyl, alkenyl or alkynyl radical.
Claim 3
Dependent Claim
21 words
The composition of claim 1 wherein R and R' are the same or different C 1 to C 10 alkyl radical.
Claim 4
Dependent Claim
22 words
The composition of claims 1, or 3 wherein the compound comprises from about 5 to about 10 volume percent of said composition.
Claim 5
Dependent Claim
11 words
The composition of claim 3 wherein said base fuel is gasoline.
Claim 6
Dependent Claim
14 words
The composition of claim 3 wherein said composition is essentially free of organo-lead compounds.
Claim 7
Dependent Claim
14 words
The composition of claim 3 wherein said composition is essentially free of organo-manganese compounds.
Claim 8
Dependent Claim
12 words
The composition of claim 3 wherein said composition is free of alcohol.
Claim 9
Dependent Claim
47 words
A composition comprising: a liquid hydrocarbon base fuel; an anti-knock enhancing amount of the compound of the formula: ##STR4## wherein R and R' are the same or different C 1 to C 10 alkyl radical and wherein said composition is essentially free of organo-lead and organo-manganese compounds.
Claim 10
Dependent Claim
47 words
A composition comprising: a liquid hydrocarbon base fuel; an anti-knock enhancing amount of the compound of the formula: ##STR4## wherein R and R' are the same or different C 1 to C 10 alkyl radical and wherein said composition is essentially free of organo-lead and organo-manganese compounds.
Claim 11
Dependent Claim
43 words
A composition comprising a major amount of a liquid hydrocarbon base fuel and an anti-knock enhancing amount of a compound of the formula: ##STR5## wherein R and R' are the same or different C 1 to C 10 alkyl, alkenyl or alkynyl radical.
Claim 12
Dependent Claim
43 words
A composition comprising a major amount of a liquid hydrocarbon base fuel and an anti-knock enhancing amount of a compound of the formula: ##STR5## wherein R and R' are the same or different C 1 to C 10 alkyl, alkenyl or alkynyl radical.
Claim 13
Dependent Claim
21 words
The composition of claim 1 wherein R and R' are the same or different and are either methyl or ethyl radicals.
References Cited (Backward Citations)
GB1444431A
Cited
US4217231A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |