US4427467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low viscosity air breathing missile fuel
Assignee: United States Department of the Navy
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Filing: 1982-04-29
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Granted: 1984-01-24
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Expires: 2002-04-29
Abstract
Abstract An improved ramjet fuel consisting of hydrogenated hydrocarbons uses a minimum weight percentage of 50% tetrahydromethylcyclopentadiene dimer (TH-dimer) with about 50% by wt. exo-tetrahydrodicyclopentadiene (Exo-THDC). The mixture exceeds U.S. Navy flash point requirements of 60 DEG C. while yielding a lower viscosity than TH-dimer alone. Volumetric heating properties of the mixture make it an excellent ramjet fuel.
Inventors
- 👤 George W. Burdette
- 👤 Lewis Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:52
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/42; F02K9/425; C; C10; C10L; C10L1/00; C10L1/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
20 words
A fuel composition comprising: about 50 to 75% by weight exo-tetrahydrodicyclopentadiene and about 25 to 50% by weight tetrahydromethylcyclopentadiene dimer.
Claim 2
Dependent Claim
20 words
A fuel composition comprising: about 50 to 75% by weight exo-tetrahydrodicyclopentadiene and about 25 to 50% by weight tetrahydromethylcyclopentadiene dimer.
Claim 3
Dependent Claim
19 words
A composition according to claim 1 comprising: about 25% by weight exo-tetrahydrodicyclopentadiene and about 75% by weight tetrahydromethylcyclopentadiene dimer.
References Cited (Backward Citations)
US3004384A
Cited
US4277636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-23 | 1987-07-25 | 1988-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-23 | 1991-07-25 | 1992-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-23 | 1995-07-25 | 1996-01-24 | $7700.00 | Window Closed / Lapsed |