US4141768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel rich solid propellant of boron and a fluoro-nitro-epoxide polymer binder
Assignee: Boeing North American Inc
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Filing: 1970-05-18
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Granted: 1979-02-27
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Expires: 1990-05-18
Abstract
Abstract A fuel-rich solid propellant gas generator is provided containing about 50 to 70% by weight of a boron fuel and about 30 to 50% by weight of an energetic binder containing a polymer of a dinitrofluoromethyl epoxide of the formula ##STR1## wherein R is alkylene of 1 to 4 carbon atoms.
Inventors
- 👤 George A. Lo
- 👤 Charles L. Hamermesh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:20
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/04; C08G65/22; C08G65/223; C08G65/226; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B45/105; C06B47/00; C06B47/02; C06B47/10; C08K; C08K3/00; C08K3/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
51 words
A fuel-rich solid propellant gas generator comprising about 50 to 70% by weight of metallic boron as a fuel and about 30 to 50% by weight of an energetic binder comprising a polymer of a dinitrofluoromethyl epoxide of the formula ##STR7## wherein R is alkylene of 1 to 4 carbon atoms.
Claim 2
Dependent Claim
51 words
A fuel-rich solid propellant gas generator comprising about 50 to 70% by weight of metallic boron as a fuel and about 30 to 50% by weight of an energetic binder comprising a polymer of a dinitrofluoromethyl epoxide of the formula ##STR7## wherein R is alkylene of 1 to 4 carbon atoms.
Claim 3
Dependent Claim
37 words
The gas generator of claim 1 in which the dinitrofluoromethyl epoxide polymer has the formula ##STR8## wherein R is alkylene of 1 to 4 carbon atoms and n is an integer of from about 3 to 25.
Claim 4
Dependent Claim
22 words
The gas generator of claim 1 in which the gas generator contains from about 18 to 30% by weight of a plasticizer.
Claim 5
Dependent Claim
12 words
The gas generator of claim 3 in which the plasticizer is bis(2-fluoro-2,2-dinitroethyl)formal.
Claim 6
Dependent Claim
11 words
The gas generator of claim 1 in which R is methylene.
Claim 7
Dependent Claim
22 words
The gas generator of claim 1 in which the gas generator contains from about 5 to 20% by weight of an oxidizer.
Claim 8
Dependent Claim
75 words
A fuel-rich solid propellant gas generator comprising about 50 to 70% by weight of metallic boron as a fuel, about 10 to 20% by weight of a dihydroxy-terminated polyether polymer of the formula ##STR9## wherein R is alkylene of 1 to 4 carbon atoms and n is an integer of from about 3 to 25, about 18 to 30% by weight of a plasticizer and about 1 to 3% by weight of a curing agent.
Claim 9
Dependent Claim
75 words
A fuel-rich solid propellant gas generator comprising about 50 to 70% by weight of metallic boron as a fuel, about 10 to 20% by weight of a dihydroxy-terminated polyether polymer of the formula ##STR9## wherein R is alkylene of 1 to 4 carbon atoms and n is an integer of from about 3 to 25, about 18 to 30% by weight of a plasticizer and about 1 to 3% by weight of a curing agent.
Claim 10
Dependent Claim
11 words
The gas generator of claim 7 in which R is methylene.
Claim 11
Dependent Claim
15 words
The gas generator of claim 7 in which the curing agent is polymethylene polyphenyl isocyanate.
Claim 12
Dependent Claim
12 words
The gas generator of claim 7 in which the plasticizer is bis(2-fluoro-2,2-dinitroethyl)formal.
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) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |