US4099931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High density liquid ramjet fuel
Assignee: United States Department of the Navy
•
Filing: 1972-10-02
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Granted: 1978-07-11
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Expires: 1992-10-02
Abstract
Abstract Blends of Decalin with n-hexane, Tetralin with n-hexane and Tetralin with Decalin are useful as high density rocket ramjet and turbojet fuels under low temperature conditions.
Inventors
- 👤 James T. Bryant
- 👤 George W. Burdette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:16
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
15 words
A fuel mixture consisting essentially of 95.2 weight percent decahydronaphthalene and 4.8 weight percent n-hexane.
Claim 2
Dependent Claim
15 words
A fuel mixture consisting essentially of 95.2 weight percent decahydronaphthalene and 4.8 weight percent n-hexane.
Claim 3
Dependent Claim
15 words
A fuel mixture consisting essentially of 80 weight percent tetrahydronaphthalene and 20 weight percent n-hexane.
Claim 4
Dependent Claim
15 words
A fuel mixture consisting essentially of 80 weight percent tetrahydronaphthalene and 20 weight percent n-hexane.
Claim 5
Independent Claim
51 words
A method for propelling a rocket ramjet or turbojet engine comprising the steps of: (a) injecting a fuel selected from the group consisting of a blend of decahydronaphthalene with n-hexane and tetrahydronaphthalene with n-hexane which freezes at a temperature just under -65° F into said engine; and (b) igniting said fuel.
Claim 6
Independent Claim
51 words
A method for propelling a rocket ramjet or turbojet engine comprising the steps of: (a) injecting a fuel selected from the group consisting of a blend of decahydronaphthalene with n-hexane and tetrahydronaphthalene with n-hexane which freezes at a temperature just under -65° F into said engine; and (b) igniting said fuel.
References Cited (Backward Citations)
CA527765A
Cited
US3126330A
Cited
GB169428A
Cited
FR531367A
Cited
US2407716A
Cited
US2765617A
Cited
US3113419A
Cited
US3236764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-10 | 1982-01-09 | 1982-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-10 | 1986-01-09 | 1986-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-10 | 1990-01-09 | 1990-07-11 | $7700.00 | Window Closed / Lapsed |