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Patent US4600408A successfully refreshed from Google Patents.
US4600408A
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US
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Gasoline compositions containing carbonates
Assignee: Union Oil Company of California
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Filing: 1985-04-29
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Granted: 1986-07-15
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Expires: 2005-04-29
Abstract
Abstract A fuel composition containing an alkyl phenyl carbonate 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 14:26
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/10; C10L1/00; C10L1/10; C10L1/14; C10L1/18; C10L1/19
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
44 words
A composition comprising a major amount of a liquid hydrocarbon base fuel and an anti-knock enhancing amount of a compound of a formula: ##STR3## wherein R is a C 1 to C 20 alkyl or alkenyl radical and R' is an unsubstituted phenyl radical.
Claim 2
Dependent Claim
44 words
A composition comprising a major amount of a liquid hydrocarbon base fuel and an anti-knock enhancing amount of a compound of a formula: ##STR3## wherein R is a C 1 to C 20 alkyl or alkenyl radical and R' is an unsubstituted phenyl radical.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein R is a C 1 to C 10 alkyl radical.
Claim 4
Dependent Claim
22 words
The composition of claims 1 or 2 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
53 words
A composition comprising: a major amount of a liquid hydrocarbon base fuel; an anti-knock enhancing amount of a compound of the formula: ##STR4## wherein R is a C 1 to C 10 alkyl radical and R' is an unsubstituted phenyl radical and wherein said composition is essentially free of organo-lead and organo-manganese compounds.
Claim 10
Dependent Claim
53 words
A composition comprising: a major amount of a liquid hydrocarbon base fuel; an anti-knock enhancing amount of a compound of the formula: ##STR4## wherein R is a C 1 to C 10 alkyl radical and R' is an unsubstituted phenyl radical and wherein said composition is essentially free of organo-lead and organo-manganese compounds.
Claim 11
Dependent Claim
44 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 is a C 1 to C 20 alkyl or alkenyl radical and R' is an unsubstituted phenyl radical.
Claim 12
Dependent Claim
44 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 is a C 1 to C 20 alkyl or alkenyl radical and R' is an unsubstituted phenyl radical.
Claim 13
Dependent Claim
9 words
The composition of claim 3 wherein R is t-butyl.
Claim 14
Dependent Claim
11 words
The composition of claim 10 wherein said base fuel is gasoline.
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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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |