US4092190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot nitrogen generator containing calcium oxide
Assignee: Boeing North American Inc
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Filing: 1977-08-10
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Granted: 1978-05-30
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Expires: 1997-08-10
Abstract
Abstract A solid propellant gas generator consisting of 45-65 weight percent calcium oxide, 25-45 weight percent calcium azide, and 8-11 weight percent calcium nitrate which produces pure nitrogen gas at temperatures above 2200° K in the complete absence of other gaseous products and metallic vapors.
Inventors
- 👤 Joseph E. Flanagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:58
CPC Classifications
C; C06; C06B; C06B35/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
37 words
A solid propellant hot nitrogen gas generator system comprising: calcium oxide as a heat absorbent calcium azide as the primary nitrogen source calcium nitrate as an oxidizing source for all the calcium present in the nitrogen source.
Claim 2
Dependent Claim
37 words
A solid propellant hot nitrogen gas generator system comprising: calcium oxide as a heat absorbent calcium azide as the primary nitrogen source calcium nitrate as an oxidizing source for all the calcium present in the nitrogen source.
Claim 3
Dependent Claim
22 words
The gas generator of claim 1 wherein calcium oxide comprises up to about 60 percent by weight of said gas generator system.
Claim 4
Dependent Claim
34 words
The gas generator of claim 1 wherein a blend of calcium azide and calcium nitrate in a molar blend of 5:1 comprises up to about 50 percent by weight of said gas generator system.
Claim 5
Dependent Claim
16 words
A solid propellant hot nitrogen gas generator containing only one metallic element and no halogen species.
Claim 6
Dependent Claim
16 words
A solid propellant hot nitrogen gas generator containing only one metallic element and no halogen species.
Claim 7
Dependent Claim
12 words
The gas generator of claim 4 wherein the metallic element is calcium.
References Cited (Backward Citations)
US3947300A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |