US6497774B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas generant for air bag
Assignee: Daicel Corp
•
Filing: 2000-12-20
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Granted: 2002-12-24
•
Expires: 2020-12-20
Abstract
Abstract A gas-generant-molded-article for air bags which is prepared by molding a gas generant composition into a cylindrical form containing an opening hole, wherein the relationship between the linear burning velocity r (mm/second) of said gas generant composition under a pressure of 70 kgf/cm2 and a thickness W (mm) of said molded article falls within a range represented by 0.005<=W/(2.r)<=0.3, with the linear burning velocity preferably falling within a range of from 1 to 12.5 mm/second.
Inventors
- 👤 Yo Yamato
- 👤 Norimasa Hirata
- 👤 Takeshi Takahori
- 👤 Takushi Yokoyama
- 👤 Naoki Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:15
CPC Classifications
C; C06; C06D; C06D5/00; C06D5/06; C06B; C06B45/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
39 words
A gas generant composition for air bags, comprising: (a) about 30 to 40% by weight of nitroguanidine, (b) about 40 to 65% by weight of an oxidizing agent, and (c) about 3 to 12% by weight of a binder.
Claim 2
Dependent Claim
39 words
A gas generant composition for air bags, comprising: (a) about 30 to 40% by weight of nitroguanidine, (b) about 40 to 65% by weight of an oxidizing agent, and (c) about 3 to 12% by weight of a binder.
Claim 3
Dependent Claim
22 words
An inflater system containing as a gas generant therein, the gas generant composition for air bags as recited in claim 1 .
Claim 4
Dependent Claim
29 words
A gas generant propellant composition for a vehicle air bag, which contains therein about 1-20 wt. % of Japanese acid clay, based on the total weight of the composition.
Claim 5
Dependent Claim
29 words
A gas generant propellant composition for a vehicle air bag, which contains therein about 1-20 wt. % of Japanese acid clay, based on the total weight of the composition.
Claim 6
Dependent Claim
32 words
The gas generant propellant composition recited in claim 3 , wherein said composition further contains 3-12 wt. % of a water soluble polysaccharide derivative, based on the total weight of the composition.
Claim 7
Dependent Claim
27 words
The gas generant composition for air bags as recited in claim 1 , which further comprises (d) about 1 to 20% by weight of a slag-forming agent.
Claim 8
Dependent Claim
39 words
The gas generant composition for air bags as recited in claim 5 , in which the slag-forming agent is selected from the group consisting of a naturally produced clay comprising aluminosilicate as the principal component, artificial clay and mica.
Claim 9
Dependent Claim
52 words
The gas generant composition for air bags as recited in claim 1 or 5 , wherein the binder is a polysaccharide derivative selected from the group consisting of a metal salt of carboxymethyl cellulose, a hydroxyethyl cellulose, a cellulose acetate, a cellulose propionate, a cellulose acetate butyrate, a nitrocellulose and a starch.
Claim 10
Dependent Claim
30 words
The gas generant composition for air bags as recited in claim 1 or 5 , wherein the oxidizing agent comprises an alkali metal nitrate or an alkaline earth metal nitrate.
Claim 11
Dependent Claim
56 words
The gas generant composition for air bags as recited in claim 5 , comprising: (a) about 30 to 40% by weight of nitroguanidine, (b) about 40 to 65% by weight of strontium nitrate, (c) about 3 to 7% by weight of Japanese acid clay and (d) about 3 to 12% by weight of sodium carboxymethyl cellulose.
Claim 12
Dependent Claim
22 words
The gas generant composition for air bags as recited in claim 5 , in which the slag-forming agent comprises Japanese acid clay.
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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) | 2005-12-23 | 2006-06-24 | 2006-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-12-23 | 2010-06-24 | 2010-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-12-23 | 2014-06-24 | 2014-12-24 | $7700.00 | Window Closed / Lapsed |