US4834818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-generating composition
Assignee: JFE Engineering Corp
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Filing: 1988-02-19
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Granted: 1989-05-30
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Expires: 2008-02-19
Abstract
Abstract Provided herein is a gas-generating composition which forms combustion residues that can be easily captured. The gas-generating composition is composed of an azide of alkali metal or alkaline earth metal, oxidizer, and 0.1 to 10 wt % of one or two kinds of solder glass represented by BaO. SiO 2 . PbO. Alkali or B 2 O 3 . TiO 2 . SiO 2 . Na 2 O. The incorporation of solder glass reduces the weight of the filter to capture combustion residues by 5 to 30 wt %.
Inventors
- 👤 Takashi Kazumi
- 👤 Chitoshi Yano
- 👤 Minoru Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:27
CPC Classifications
C; C06; C06D; C06D5/00; C06D5/06; C06B; C06B35/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
92 words
In a gas generating composition comprising from 60 to 90% by weight of an azide of an alkali metal or alkaline earth metal, up to 20% by weight of an inorganic oxidizing agent and from 5% by weight to a stoichiometrical amount of a metal oxide, the improvement characterized by said composition further comprising at least one solder glass selected from the group of compositions consisting of BaO.SiO 2 .PbO.Alkali and B 2 O 3 .TiO 2 .SiO 2 .Na 2 O, in an amount of from 0.1 to 10% by weight.
Claim 2
Dependent Claim
92 words
In a gas generating composition comprising from 60 to 90% by weight of an azide of an alkali metal or alkaline earth metal, up to 20% by weight of an inorganic oxidizing agent and from 5% by weight to a stoichiometrical amount of a metal oxide, the improvement characterized by said composition further comprising at least one solder glass selected from the group of compositions consisting of BaO.SiO 2 .PbO.Alkali and B 2 O 3 .TiO 2 .SiO 2 .Na 2 O, in an amount of from 0.1 to 10% by weight.
Claim 3
Dependent Claim
26 words
A gas generating composition as claimed in claim 1, wherein the azide of an alkali metal or alkaline earth metal is sodium azide (NaN 3 ).
Claim 4
Dependent Claim
26 words
A gas generating composition as claimed in claim 1, wherein the inorganic oxidizing agent is potassium nitrate (KNO 3 ) or potassium perchlorate (KClO 4 ).
Claim 5
Dependent Claim
19 words
A gas generating composition as claimed in claim 1, wherein the metal oxide is iron oxide or copper oxide.
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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) | 1992-05-29 | 1992-11-28 | 1993-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-29 | 1996-11-28 | 1997-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-29 | 2000-11-28 | 2001-05-30 | $7700.00 | Window Closed / Lapsed |