US4367351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density fuel compositions
Assignee: Ashland LLC
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Filing: 1981-07-01
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Granted: 1983-01-04
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Expires: 2001-07-01
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 mixture of C5-C7 alkanes and/or cycloalkanes and hydrogenated dimers of norbornadiene.
Inventors
- 👤 Dennis H. Fisher
- 👤 Steven C. Howe
- 👤 Richard L. Linard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:04
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; Y; Y10; Y10S; Y10S149/00; Y10S149/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
42 words
A high density fuel composition consisting essentially of (a) from 70-95 weight percent of exo-tetrahydrodicyclopentadiene; (b) from 4-20 weight percent of the hydrogenated dimers of norbornadiene; and (c) from 1-7 weight percent of an isomeric mixture of C 5 -C 7 hydrocarbons.
Claim 2
Dependent Claim
42 words
A high density fuel composition consisting essentially of (a) from 70-95 weight percent of exo-tetrahydrodicyclopentadiene; (b) from 4-20 weight percent of the hydrogenated dimers of norbornadiene; and (c) from 1-7 weight percent of an isomeric mixture of C 5 -C 7 hydrocarbons.
Claim 3
Dependent Claim
28 words
A high density fuel composition according to claim 1 wherein the isomeric C 5 hydrocarbon mixture of component (c) is present as a major proportion of said component.
Claim 4
Dependent Claim
24 words
A high density fuel composition according to claim 2 wherein the isomeric C 5 hydrocarbon mixture is composed of a major amount of cyclopentane.
Claim 5
Dependent Claim
30 words
A high density fuel composition according to claim 2 or 3 consisting essentially of from 80-90 weight percent (a); from 8-16 weight percent (b); and from 2-4 weight percent (c).
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) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |