Patent US4963412A successfully refreshed from Google Patents.
US4963412A
Expired / Lapsed
US
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Sheet material for vehicle safety air bags
Assignee: Takata Corp
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Filing: 1989-06-14
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Granted: 1990-10-16
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Expires: 2009-06-14
Abstract
Abstract Sheet material for use in vehicle safety air bags comprises a multiplicity of perforated films of polymeric material having holes, the perforated films being superposed on each other such that the holes in adjacent films do not overlap to any great extent, and adhesive filling the holes of all of the perforated films other than the outermost ones and uniting them into a laminate.
Inventors
- 👤 Akira Kokeguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:09
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/266; B60; B60R; B60R21/00; B60R21/02; B60R21/16; B32B27/00; B32B27/06; B32B27/08; B32B7/00; B32B7/04; B32B7/12; B60R21/23; B60R21/235; B32B2250/00; B32B2250/24; B32B2305/00; B32B2305/02; B32B2305/028; B32B2605/00; B32B2605/003; B32B2605/08; B60R2021/23504; B60R2021/23523; B60R2021/23533; B60R2021/23557; B60R2021/23571; B60R2021/2359; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24339; Y10T428/24347; Y10T428/24802; Y10T428/24826; Y10T428/31504; Y10T428/31551; Y10T428/31565
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
74 words
Sheet material for use in vehicle safety air bags comprising a multiplicity of perforated films of polymeric material having holes, the holes in the films being free of corners and the perforated films being superposed directly on each other and aligned such that the holes in adjacent films do not entirely overlap, and adhesive filling the holes of all of the perforated films other than the outermost one and uniting them into a laminate.
Claim 2
Dependent Claim
74 words
Sheet material for use in vehicle safety air bags comprising a multiplicity of perforated films of polymeric material having holes, the holes in the films being free of corners and the perforated films being superposed directly on each other and aligned such that the holes in adjacent films do not entirely overlap, and adhesive filling the holes of all of the perforated films other than the outermost one and uniting them into a laminate.
Claim 3
Dependent Claim
36 words
Sheet material according to claim 1 and further comprising a non-perforated film adhered to an outermost perforated film and an adhesive filling the holes of said outermost film to unite the non-perforated film to the laminate.
Claim 4
Dependent Claim
17 words
Sheet material according to claim 1 wherein the holes in the perforated films have curved edges throughout.
Claim 5
Dependent Claim
20 words
Sheet material according to claim 1 wherein the maximum dimension of the holes in any direction is about 20 mm.
Claim 6
Dependent Claim
20 words
Sheet material according to claim 1 wherein the minimum dimension of the holes in any direction is about 5 mm.
Claim 7
Dependent Claim
29 words
Sheet material according to claim 1 wherein the total area of the holes in each perforated film does not exceed about 50% of the total area of the film.
Claim 8
Dependent Claim
31 words
Sheet material according to claim 6 wherein the total area of the holes in each perforated film is from about 25% to about 45% of the total area of the film.
Claim 9
Dependent Claim
20 words
Sheet material according to claim 1 wherein the total thickness of the sheet material does not exceed about 300 micrometers.
Claim 10
Dependent Claim
27 words
Sheet material according to claim 8 wherein the total thickness of the sheet material is in the range of from about 250 micrometers to about 300 micrometers.
References Cited (Backward Citations)
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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) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |