US4286109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density fuel compositions
Assignee: Ashland LLC
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Filing: 1980-07-31
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Granted: 1981-08-25
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Expires: 2000-07-31
Abstract
Abstract A high density specialty fuel for propelling limited volume ramjet and turbojet missile systems comprising a blend of at least 70 weight percent of exotetrahydrodicyclopentadiene and a correspondingly minor amount of a combination of a C 5 -C 7 alkane or cycloalkane and a tetrahydro derivative of the trimer and/or co-trimer of cyclopentadiene and methylcyclopentadiene.
Inventors
- 👤 Richard V. Norton
- 👤 Dennis H. Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:32
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; Y; Y10; Y10S; Y10S149/00; Y10S149/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
68 words
A high density fuel composition consisting essentially of (a) from 70-95 weight percent of exo-tetrahydro dicyclopentadiene; (b) from 4-25 weight percent of the tetrahydro derivative of an oligomer selected from the group consisting of a co-trimer of cyclopentadiene and methylcyclopentadiene, a trimer of cyclopentadiene, a trimer of methylcyclopentadiene, and mixtures thereof; and (c) from 1-7 weight percent of a C 5 -C 7 alkane, cycloalkane or mixtures thereof.
Claim 2
Dependent Claim
68 words
A high density fuel composition consisting essentially of (a) from 70-95 weight percent of exo-tetrahydro dicyclopentadiene; (b) from 4-25 weight percent of the tetrahydro derivative of an oligomer selected from the group consisting of a co-trimer of cyclopentadiene and methylcyclopentadiene, a trimer of cyclopentadiene, a trimer of methylcyclopentadiene, and mixtures thereof; and (c) from 1-7 weight percent of a C 5 -C 7 alkane, cycloalkane or mixtures thereof.
Claim 3
Dependent Claim
19 words
A high density fuel composition according to claim 1 wherein said oligomer is a co-trimer of cyclopentadiene and methylcyclopentadiene.
Claim 4
Dependent Claim
17 words
A high density fuel composition according to claim 1 wherein said oligomer is the trimer of cyclopentadiene.
Claim 5
Dependent Claim
17 words
A high density fuel composition according to claim 1 wherein said oligomer is the trimer of methylcyclopentadiene.
Claim 6
Dependent Claim
34 words
A high density fuel composition according to claim 2, 3, or 4 consisting essentially of from 85-91 weight percent of (a); from 7-12 weight percent of (b); and from 2-3 weight percent of (c).
Claim 7
Dependent Claim
25 words
A high density fuel composition according to claim 5 wherein said component (c) is a mixture of isomeric pentanes containing a major amount of cyclopentane.
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) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |