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US4243443A
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Azide and doped iron oxide gas generating composition
Assignee: Orica Explosives Technology Pty Ltd
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Filing: 1979-06-04
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Granted: 1981-01-06
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Expires: 1999-06-04
Abstract
Abstract A nitrogen gas generating composition is provided which consists of a stoichiometric mixture of an alkali metal azide or an alkali earth metal azide and a doped iron oxide of high chemical reactivity. The doped iron oxide contains up to 1.0% by weight of another metal oxide impregnated into its particle lattice. The resulting composition has improved properties of ignition delay time, total burn time, filter-ability and reduced toxic by-products.
Inventors
- 👤 Lechoslaw A. M. Utracki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:42
CPC Classifications
C; C06; C06B; C06B23/00; C06B23/005; C01; C01B; C01B21/00; C01B21/02; C06B23/007; C06B35/00; C06D; C06D5/00; C06D5/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
A solid nitrogen gas generating composition comprising a substantially stoichiometric admixture of an alkali metal azide or an alkali earth metal azide and a doped iron oxide, said doped iron oxide comprising an acicular iron oxide particle having an amount of up to 1.0% by weight of other metal oxide selected from nickel oxide and cobalt oxide impregnated into the iron oxide lattice, said doped iron oxide further having a particular size of less than 10 microns.
Claim 2
Dependent Claim
77 words
A solid nitrogen gas generating composition comprising a substantially stoichiometric admixture of an alkali metal azide or an alkali earth metal azide and a doped iron oxide, said doped iron oxide comprising an acicular iron oxide particle having an amount of up to 1.0% by weight of other metal oxide selected from nickel oxide and cobalt oxide impregnated into the iron oxide lattice, said doped iron oxide further having a particular size of less than 10 microns.
Claim 3
Dependent Claim
15 words
A composition as claimed in claim 1 wherein the alkali metal azide is sodium azide.
Claim 4
Dependent Claim
22 words
A composition as claimed in claim 1 wherein the particle size of the doped iron oxide is from 0.5 to 2 microns.
Claim 5
Dependent Claim
21 words
A composition as claimed in claim 1 wherein the iron oxide which is doped is α -Fe 2 O 3 .
References Cited (Backward Citations)
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Cited
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US3821120A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-06 | 1984-07-07 | 1985-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-06 | 1988-07-07 | 1989-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-06 | 1992-07-07 | 1993-01-06 | $7700.00 | Window Closed / Lapsed |