US4238253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Starch as fuel in gas generating compositions
Assignee: Honeywell International Inc
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Filing: 1978-05-15
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Granted: 1980-12-09
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Expires: 1998-05-15
Abstract
Abstract Starch is used as a fuel/binder in pyrotechnic propellant compositions suitable for use in vehicle safety restraint systems.
Inventors
- 👤 Eugene F. Garner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:07
CPC Classifications
C; C06; C06D; C06D5/00; C06D5/06; C06B; C06B29/00; C06B29/02; C06B29/04; C06B45/00; C06B45/04; C06B45/06; C06B45/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
109 words
A pyrotechnic composition for use in providing a generating gas to inflate an inflatable device, said composition comrpising: (a) about 45 l to 50 weight percent of an inorganic oxidizer; (b) about 8 to 13 weight percent of starch having a particle size of about 4 to 30 microns; (c) about 35 to 45 weight percent of a coolant selected from the group consisting of calcium hydroxide, magnesium chloride, calcium carbonate and magnesium carbonate; (d) about 1 to 2 weight percent of an oxygen-containing polymeric compound selected from the group consisting of polyacetal resins and polyvinyl acetate resins; and (e) about 0 to 1 weight percent of carbon black.
Claim 2
Dependent Claim
109 words
A pyrotechnic composition for use in providing a generating gas to inflate an inflatable device, said composition comrpising: (a) about 45 l to 50 weight percent of an inorganic oxidizer; (b) about 8 to 13 weight percent of starch having a particle size of about 4 to 30 microns; (c) about 35 to 45 weight percent of a coolant selected from the group consisting of calcium hydroxide, magnesium chloride, calcium carbonate and magnesium carbonate; (d) about 1 to 2 weight percent of an oxygen-containing polymeric compound selected from the group consisting of polyacetal resins and polyvinyl acetate resins; and (e) about 0 to 1 weight percent of carbon black.
Claim 3
Dependent Claim
25 words
The composition of claim 1 wherein the inorganic oxidizer is selected from the group consisting of sodium chlorate, potassium chlorate, sodium perchlorate, and potassium perchlorate.
Claim 4
Dependent Claim
11 words
The composition of claim 2 wherein the starch is corn starch.
Claim 5
Dependent Claim
12 words
The composition of claim 1 wherein the inorganic oxidizer is sodium chlorate.
Claim 6
Dependent Claim
11 words
The composition of claim 4 wherein the coolant is calcium hydroxide.
Claim 7
Dependent Claim
13 words
The composition of claim 5 wherein the oxygen-containing polymeric compound is polyvinyl acetate.
Claim 8
Dependent Claim
21 words
The composition of claim 1 wherein said carbon black is present in an amount of about 0.4 to 0.6 weight percent.
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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |