US4172048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixture suitable for an aerostat
Assignee: United States Department of the Navy
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Filing: 1978-10-02
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Granted: 1979-10-23
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Expires: 1998-10-02
Abstract
Abstract A balloon filled with a gas mixture of ammonia and n-hexane will stay at aonstant altitude due to condensation at altitude of the n-hexane. Since both components are liquid below about 50 meters in the ocean and together with the load are buoyant, the aerostat may be submarine launched and rise to the surface at which point the ammonia and n-hexane evaporate and take the balloon and load to its preset altitude.
Inventors
- 👤 Richard M. Dunlap
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:38
CPC Classifications
B; B64; B64B; B64B1/00; B64B1/58
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
30 words
A gaseous mixture for use in an aerostat consisting essentially of n-hexane and ammonia wherein the mole fraction of n-hexane is between 0.0157 and 0.139, and the balance is ammonia.
Claim 2
Dependent Claim
30 words
A gaseous mixture for use in an aerostat consisting essentially of n-hexane and ammonia wherein the mole fraction of n-hexane is between 0.0157 and 0.139, and the balance is ammonia.
Claim 3
Dependent Claim
30 words
A gaseous mixture for use in an aerostat consisting essentially of n-hexane and ammonia wherein the mole fraction of n-hexane is between 0.030 and 0.101, and the balance is ammonia.
Claim 4
Dependent Claim
30 words
A gaseous mixture for use in an aerostat consisting essentially of n-hexane and ammonia wherein the mole fraction of n-hexane is between 0.030 and 0.101, and the balance is ammonia.
Claim 5
Dependent Claim
30 words
A gaseous mixture for use in an aerostat consisting essentially of n-hexane and ammonia wherein the mole fraction of n-hexane is between 0.030 and 0.053, and the balance is ammonia.
Claim 6
Dependent Claim
30 words
A gaseous mixture for use in an aerostat consisting essentially of n-hexane and ammonia wherein the mole fraction of n-hexane is between 0.030 and 0.053, and the balance is ammonia.
References Cited (Backward Citations)
US3412963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |