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USH169H
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Ignition composition
Assignee: United States Department of the Navy
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Filing: 1986-05-22
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Granted: 1986-12-02
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Expires: 2006-05-22
Abstract
Abstract An igniter composition for a gas generator comprises a stoichiometric comation of pyrotechnic metal selected from the group consisting of beryllium, boron, lithium, sodium, titanium, magnesium, aluminum and alloys and mixtures thereof and one or more halogenated polymers; and fumed colloidal silica in an amount from about 0.5 to about 2.5 percent of the total composition weight.
Inventors
- 👤 Gerald L. Mackenzie
- 👤 Robert O. Petri
- 👤 James E. Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:42
CPC Classifications
C; C06; C06C; C06C9/00; C06B; C06B27/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
65 words
An igniter composition for a gas generator comprises, on the basis of total composition weight, from about 97.5 to about 99.5 percent of a stoichiometric combination of a pyrotechnic metal selected from the group consisting of beryllium, lithium, sodium, titanium, magnesium, aluminum, boron and alloys and mixtures thereof and one or more halogenated polymers; and from about 0.5 to 2.5 percent of fumed colloidal silica.
Claim 2
Dependent Claim
65 words
An igniter composition for a gas generator comprises, on the basis of total composition weight, from about 97.5 to about 99.5 percent of a stoichiometric combination of a pyrotechnic metal selected from the group consisting of beryllium, lithium, sodium, titanium, magnesium, aluminum, boron and alloys and mixtures thereof and one or more halogenated polymers; and from about 0.5 to 2.5 percent of fumed colloidal silica.
Claim 3
Dependent Claim
43 words
The igniter composition of claim 1 wherein said pyrotechnic metal is selected from the group consisting of magnesium, alloys of magnesium and aluminum wherein the amount of aluminum is from about 1 to 15 percent of the total alloy weight, and mixtures thereof.
Claim 4
Dependent Claim
20 words
The igniter composition of claim 1 wherein said halogenated polymer is selected from the group consisting of fluoropolymers and fluorochloropolymers.
Claim 5
Dependent Claim
20 words
The igniter composition of claim 2 wherein said halogenated polymer is selected from the group consisting of fluoropolymers and fluorochloropolymers.
Claim 6
Dependent Claim
13 words
The igniter composition of claim 4 wherein said halogenated polymer is a fluoropolymer.
Claim 7
Dependent Claim
18 words
The igniter composition of claim 4 wherein the amount of said silica is from 1 to 2 percent.
Claim 8
Dependent Claim
18 words
The igniter composition of claim 5 wherein the amount of said silica is from 1 to 2 percent.
Claim 9
Dependent Claim
19 words
The igniter composition of claim 5 wherein said halogenated polymer is a perfluoropolymer and said pyrotechnic metal is magnesium.
Claim 10
Dependent Claim
18 words
The igniter composition of claim 8 wherein the amount of said silica is from 1.5 to 2.0 percent.
Claim 11
Dependent Claim
12 words
The igniter composition of claim 9 wherein said halogenated polymer is polytetrafluoroethylene.
Claim 12
Dependent Claim
42 words
An igniter composition for a gas generator comprises, on the basis of total composition weight, from about 31.5 to 34 percent of magnesium; from about 63.5 to 68 percent of polytetrafluoroethylene, and from about 0.5 to 2.5 percent of fumed colloidal silica.
Claim 13
Dependent Claim
42 words
An igniter composition for a gas generator comprises, on the basis of total composition weight, from about 31.5 to 34 percent of magnesium; from about 63.5 to 68 percent of polytetrafluoroethylene, and from about 0.5 to 2.5 percent of fumed colloidal silica.
Claim 14
Dependent Claim
30 words
The igniter composition of claim 11 wherein the amount of polytetrafluoroethylene is from 32.4 to 32.5 percent and the amount of fumed colloidal silica is from 1.5 to 2.0 percent.
References Cited (Backward Citations)
US3753811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |