US3883373A
Expired / Lapsed
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Gas generating compositions
Assignee: PPG Architectural Coatings Canada Inc
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Filing: 1973-07-02
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Granted: 1975-05-13
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Expires: 1993-07-02
Abstract
Abstract A gas generating composition having as ingredients an alkali or alkaline earth metal azide, an oxidizing compound, an oxide such as silica or alumina, and optionally, a metal such as silicon or aluminum. The composition is useful as a source of gas to inflate bags used as restraint systems for the protection of automobile passengers.
Inventors
- 👤 Eric William Sidebottom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:45
CPC Classifications
C; C06; C06D; C06D5/00; C06D5/06; C06B; C06B23/00; C06B35/00
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
13 words
A GAS GENERATING COMPOSITION COMPRISING A MIXTURE OF PARTICLES OF THE FOLLOWING INGREDIENTS
Claim 2
Dependent Claim
13 words
A GAS GENERATING COMPOSITION COMPRISING A MIXTURE OF PARTICLES OF THE FOLLOWING INGREDIENTS
Claim 3
Dependent Claim
10 words
AN ALKALI METAL AZIDE OR AN ALKALINE EARTH METAL AZIDDE,
Claim 4
Dependent Claim
10 words
AN ALKALI METAL AZIDE OR AN ALKALINE EARTH METAL AZIDDE,
Claim 5
Dependent Claim
19 words
AN OXIDIZING COMPOUND IN PROPORTION SUFFICIENT TO REACT COMPLETELY WITH SAID AZIDE WITH THE LIBERATION OF NITROGEN THEREFROM, AND
Claim 6
Dependent Claim
19 words
AN OXIDIZING COMPOUND IN PROPORTION SUFFICIENT TO REACT COMPLETELY WITH SAID AZIDE WITH THE LIBERATION OF NITROGEN THEREFROM, AND
Claim 7
Dependent Claim
38 words
A gas generating composition as claimed in claim 1 wherein the azide is selected from the group consisting of lithium azide, sodium azide, potassium azide, rubidium azide, cesium azide, calcium azide, magnesium azide, strontium azide and barium azide.
Claim 8
Dependent Claim
19 words
an oxidizing compound in proportion suffiCient to react completely with said azide with the liberation of nitrogen therefrom, and
Claim 9
Dependent Claim
19 words
an oxidizing compound in proportion suffiCient to react completely with said azide with the liberation of nitrogen therefrom, and
Claim 10
Dependent Claim
59 words
an oxide selected from the group consisting of silicon dioxide, aluminum oxide, titanium dioxide, tin oxide and zinc oxide, with or without admixture with a metal selected from the group consisting of silicon, aluminum, tin and zinc, said oxide and metal being in proportion sufficient to react with all the metallic residue of the reaction between (1) and (2).
Claim 11
Dependent Claim
59 words
an oxide selected from the group consisting of silicon dioxide, aluminum oxide, titanium dioxide, tin oxide and zinc oxide, with or without admixture with a metal selected from the group consisting of silicon, aluminum, tin and zinc, said oxide and metal being in proportion sufficient to react with all the metallic residue of the reaction between (1) and (2).
Claim 12
Dependent Claim
38 words
A gas generating composition as claimed in claim 1 wherein the oxidizing compound is a metal peroxide selected from the group consisting of sodium peroxide, potassium peroxide, rubidium peroxide, cesium peroxide, calcium peroxide, strontium peroxide and barium peroxide.
Claim 13
Dependent Claim
59 words
AN OXIDE SELECTED FROM THE GROUP CONSISTING OF SILICON DIOXIDE, ALUMINUM OXIDE, TITANIUM DIOXIDE, TIN OXIDE AND ZINC OXIDE, WITH OR WITHOUT ADMIXTURE WITH A METAL SELECTED FROM THE GROUP CONSISTING OF SILICON, ALUMINUM, TIN AND ZINC, SAID OXIDE AND METAL BEING IN PROPORTION SUFFICIENT TO REACT WITH ALL THE METALLIC RESIDUE OF THE REACTION BETWEEN (1) ANS (2).
Claim 14
Dependent Claim
59 words
AN OXIDE SELECTED FROM THE GROUP CONSISTING OF SILICON DIOXIDE, ALUMINUM OXIDE, TITANIUM DIOXIDE, TIN OXIDE AND ZINC OXIDE, WITH OR WITHOUT ADMIXTURE WITH A METAL SELECTED FROM THE GROUP CONSISTING OF SILICON, ALUMINUM, TIN AND ZINC, SAID OXIDE AND METAL BEING IN PROPORTION SUFFICIENT TO REACT WITH ALL THE METALLIC RESIDUE OF THE REACTION BETWEEN (1) ANS (2).
Claim 15
Dependent Claim
44 words
A gas generating composition as claimed in claim 1 wherein the oxidizing compound is an inorganic perchlorate selected from the group consisting of lithium perchlorate, sodium perchlorate, potassium perchlorate, rubidium perchlorate, magnesium perchlorate, calcium perchlorate, strontium perchlorate, barium perchlorate, ferric perchlorate and cobalt perchlorate.
Claim 16
Dependent Claim
56 words
A gas generating composition as claimed in claim 1 wherein the oxidizing compound is a metal nitrate selected from the group consisting of lithium nitrate, sodium nitrate, potassium nitrate, copper nitrate, silver nitrate, magnesium nitrate, barium nitrate, zinc nitrate, aluminum nitrate, thallium nitrate, stannic nitrate, bismuth nitrate, manganese nitrate, ferric nitrate, ferrous nitrate and nickel nitrate.
Claim 17
Dependent Claim
19 words
A gas generating composition as claimed in claim 1 including as ingredient fumed silica coated with a water repellent.
Claim 18
Dependent Claim
16 words
A gas generating composition as claimed in claim 6 wherein the water repellant is a silane.
Claim 19
Dependent Claim
21 words
A gas generating composition as claimed in claim 6 wherein the fumed silica ingredient comprises 2% by weight of the composition.
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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |