Patent US4335802A successfully refreshed from Google Patents.
US4335802A
Expired / Lapsed
US
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Sound absorbing material
Assignee: Soundcoat Co Inc
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Filing: 1979-10-31
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Granted: 1982-06-22
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Expires: 1999-10-31
Abstract
Abstract A multilayered sound absorbing panel formed from aramid cloth and aramid felt layers. An intervening film between the cloth and felt layers may be included, bonded to those layers in interrupted patterns so as to leave portions of the film non-bonded to the cloth and felt layers.
Inventors
- 👤 Francis Kirschner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:18
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/12; G; G10; G10K; G10K11/00; G10K11/16; G10K11/162; G10K11/168; B32B27/28; B32B27/281; B32B2307/00; B32B2307/10; B32B2605/00; B32B2605/18; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
33 words
A multilayered sound absorbing panel which comprises an aramid cloth layer and an aramid felt layer, the fibers of both layers resisting breaking, flame, high temperature, chemical attack, abrasion, and wicking of fluids.
Claim 2
Dependent Claim
33 words
A multilayered sound absorbing panel which comprises an aramid cloth layer and an aramid felt layer, the fibers of both layers resisting breaking, flame, high temperature, chemical attack, abrasion, and wicking of fluids.
Claim 3
Dependent Claim
19 words
A panel according to claim 1, in which an intervening film is included between said cloth and felt layers.
Claim 4
Dependent Claim
37 words
A panel according to claim 2, in which said intervening film is bonded to said cloth and felt layers in interrupted patterns so as to leave portions of said film non-bonded to said cloth and felt layers.
Claim 5
Dependent Claim
21 words
A panel according to claim 1, 2 or 3, in which said cloth layer is about 0.002 to 0.005 inch thick.
Claim 6
Dependent Claim
18 words
A panel according to claim 4, in which said felt layer is about 1/8 to 1/2 inch thick.
Claim 7
Dependent Claim
16 words
A panel according to claim 2 or 3, in which said film is a polyimide film.
Claim 8
Dependent Claim
15 words
A panel according to claim 6, in which said film is about 0.0005 inch thick.
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) | 1985-06-21 | 1985-12-21 | 1986-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-21 | 1989-12-21 | 1990-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-21 | 1993-12-21 | 1994-06-22 | $7700.00 | Window Closed / Lapsed |