Patent US3308712A successfully refreshed from Google Patents.
Patent US4363848A successfully refreshed from Google Patents.
US4363848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Three layered foam-containing laminate suitable for use as an automobile headliner
Assignee: BP Corp North America Inc
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Filing: 1981-06-01
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Granted: 1982-12-14
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Expires: 2001-06-01
Abstract
Abstract Laminate suitable for use as automobile trim panel or headliner comprising the following layers: (1) polypropylene fabric, (2) a solid layer comprising a physical mixture of a copolymer of styrene and maleic anhydride, preferably a rubber modified copolymer, and polypropylene and (3) a foam of a copolymer of styrene and maleic anhydride. The laminates can be shaped by thermoforming. Optionally the laminate can contain, on the foam side opposite the fabric, a sheet or film of a rubber modified copolymer of styrene and maleic anhydride.
Inventors
- 👤 Edward C. Le Duc
- 👤 John C. Schubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:19
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; B60; B60R; B60R13/00; B60R13/02; B60R13/0212; B60R13/0225; B32B37/00; B32B37/12; B32B37/1207; B32B2037/1215; B32B2323/00; B32B2323/10; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249985; Y10T428/249987; Y10T428/249988; Y10T428/249991; Y10T428/249992; Y10T428/249993; Y10T442/00; Y10T442/30; Y10T442/3325; Y10T442/3366
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
42 words
A decorative laminate comprising the following layers in order: (1) polypropylene fabric, (2) a solid layer comprising a physical mixture of a copolymer of styrene and maleic anhydride and polypropylene, and (3) a foam of a copolymer of styrene and maleic anhydride.
Claim 2
Dependent Claim
42 words
A decorative laminate comprising the following layers in order: (1) polypropylene fabric, (2) a solid layer comprising a physical mixture of a copolymer of styrene and maleic anhydride and polypropylene, and (3) a foam of a copolymer of styrene and maleic anhydride.
Claim 3
Dependent Claim
19 words
The laminate of claim 1 wherein the copolymer in layer (2) is a rubber modified or impact grade copolymer.
Claim 4
Dependent Claim
32 words
The laminate of claim 1 wherein layer (2) contains 20 to 80 percent by weight of the copolymer of styrene and maleic anhydride and 80 to 20 percent by weight of polypropylene.
Claim 5
Dependent Claim
31 words
The laminate of claim 1 wherein layer (2) contains 40 to 60 by weight of the copolymer of styrene and maleic anyhydride and 60 to 40 percent by weight of polypropylene.
Claim 6
Dependent Claim
20 words
The laminate of claim 1 wherein the polypropylene in layer (2) has a melt flow rate of 30 to 50.
Claim 7
Dependent Claim
28 words
The laminate of claim 1 further comprising, as a layer (4), a solid sheet or film of rubber modified copolymer of styrene and maleic anhydride opposite layer (1).
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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) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |