Patent US3574108A successfully refreshed from Google Patents.
US3574108A
Expired / Lapsed
US
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Sound deadening metal laminate
Assignee: Wyeth Holdings LLC
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Filing: 1968-05-13
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Granted: 1971-04-06
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Expires: 1988-05-13
Abstract
Abstract METAL LAMINATES COMPRISING A THINNER OUTER METAL SKIN LAYER AND A THICKER PERFORATED CORE LAYER BONDED TOGETHER WITH A POLYURETHANE RESIN-BASED ADHESIVE ARE DISCLOSED. THE CORE LAYER CAN BE PROVIDED WITH A SECOND OUTER METAL LAYER. THE CORE LAYER HAS A THICKNESS OF 5 TO 1000 MILS, THE OUTER LAYERS HAVE A THICKNESS OF 1 TO 100 MILS, WITH THE THICKNESS RATIO OF THE CORE LAYER TO THE OUTER LAYER BEING AT LEAST 4:1. THE OPEN AREA OF THE CORE LAYER CAN RANGE FROM 40 TO 70%; THE PERFORATIONS ARE SUBSTANTIALLY VOID OF ADHESIVE.
Inventors
- 👤 Armand Francis Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:06
CPC Classifications
F; F16; F16L; F16L13/00; F16L13/10; F16L13/103; B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B64; B64C; B64C1/00; B64C1/40; C; C08; C08L; C08L63/00; C09; C09J; C09J175/00; C09J175/04; E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04C; E04C2/00; E04C2/02; E04C2/26; F16L9/00; F16L9/02; C08L2666/00; C08L2666/02; C08L2666/14; C08L2666/28; E04B2001/8457; E04B2001/8461; E04B2001/8476; E04B2001/848; E04B2001/849; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/26; Y10T428/266; Y10T428/31504; Y10T428/31551; Y10T428/31605; Y10T428/31678; Y10T428/31692
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |