US3658608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrazinium nitroformate propellant stabilized with nitroguanidine
Assignee: National Aeronautics and Space Administration
•
Filing: 1970-09-23
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Granted: 1972-04-25
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Expires: 1990-09-23
Abstract
Abstract The stability of solid propellant compositions containing unsaturated carboxyl terminated hydrocarbon binders and hydrazinium nitroformate as an oxidizer will have improved shelf life and stability through the incorporation of nitroquanidine in the mixture.
Inventors
- 👤 Vernon E Haury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:43
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/02; C06B47/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
12 words
The composition of claim 1 wherein said binder is carboxyl terminated polybutadiene.
Claim 2
Dependent Claim
12 words
The composition of claim 1 wherein said curing agent is triethylene melamine.
Claim 3
Dependent Claim
12 words
The composition of claim 1 further comprising: a solid particulate metal fuel.
Claim 4
Dependent Claim
43 words
A solid propellant composition comprising: 5 to 25 weight percent of unsaturated carboxyl terminated polymeric hydrocarbon binder, 50 to 65 weight percent hydrazinium nitroformate, 0.2 to 1.0 weight percent of a curing agent for said binder, and 2 to 20 weight percent nitroguanidine.
Claim 5
Dependent Claim
18 words
The composition of claim 5 further comprising: 5 to 20 weight percent of a solid particulate metal fuel.
Claim 6
Dependent Claim
12 words
The composition of claim 6 wherein said binder is carboxyl terminated polybutadiene.
Claim 7
Dependent Claim
12 words
The composition of claim 7 wherein said curing agent is triethylene melamine.
Claim 8
Dependent Claim
19 words
The composition of claim 5 additionally comprising: up to 20 weight percent of a suitable plasticizer for said binder.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |