Patent US4387257A successfully refreshed from Google Patents.
US4387257A
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US
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Motor fuel
Assignee: Phillips Petroleum Co
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Filing: 1982-06-29
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Granted: 1983-06-07
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Expires: 2002-06-29
Abstract
Abstract Liquid hydrocarbon fuel compositions are provided containing antiknock quantities of ashless antiknock agents comprising selected bicyclic diolefins such as norbornadiene.
Inventors
- 👤 Lyle D. Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:00
CPC Classifications
C; C10; C10L; C10L10/00; C10L10/10; C10L1/00; C10L1/10; C10L1/14; C10L1/16; C10L1/1608
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
24 words
A fuel composition comprising a hydrocarbon suitable as a fuel for an internal combustion engine and an antiknock improving amount of a bicyclic diolefin.
Claim 2
Dependent Claim
24 words
A fuel composition comprising a hydrocarbon suitable as a fuel for an internal combustion engine and an antiknock improving amount of a bicyclic diolefin.
Claim 3
Dependent Claim
18 words
A composition according to claim 1 wherein said diolefin is norbornadiene or an alkyl or aryl derivative thereof.
Claim 4
Dependent Claim
21 words
A composition according to claim 1 wherein said fuel contains from about 0.5 to about 10 weight percent of said diolefin.
Claim 5
Dependent Claim
24 words
A composition according to claim 1 wherein said hydrocarbon is a distillate boiling in the range of about 70° F. to about 420° F.
Claim 6
Dependent Claim
17 words
A composition according to claim 1 which is unleaded gasoline containing an antiknock improving amount of norbornadiene.
Claim 7
Dependent Claim
21 words
A composition according to claim 5 wherein said amount is in the range of about 0.5 to about 10 wt. %.
Claim 8
Independent Claim
30 words
A method for improving the operation of an internal combustion engine comprising the addition to the hydrocarbon fuel for the engine of an antiknock improving amount of a bicyclic diolefin.
Claim 9
Independent Claim
30 words
A method for improving the operation of an internal combustion engine comprising the addition to the hydrocarbon fuel for the engine of an antiknock improving amount of a bicyclic diolefin.
Claim 10
Dependent Claim
18 words
A method according to claim 7 wherein said diolefin is norbornadiene or an alkyl or aryl derivative thereof.
Claim 11
Dependent Claim
21 words
A method according to claim 7 wherein said fuel contains from about 0.5 to about 10 weight percent of said diolefin.
Claim 12
Dependent Claim
24 words
A method according to claim 7 wherein said hydrocarbon is a distillate boiling in the range of about 70° F. to about 420° F.
Claim 13
Dependent Claim
15 words
A method according to claim 7 wherein said hydrocarbon is unleaded gasoline which contains norbornadiene.
Claim 14
Dependent Claim
20 words
A method according to claim 11 wherein said gasoline contains from about 0.5 to about 10 wt. % of norbornadiene.
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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) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |