US3748167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for applying an acoustic barrier
Assignee: United States Department of the Navy
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Filing: 1971-08-09
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Granted: 1973-07-24
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Expires: 1991-08-09
Abstract
Abstract AN ACOUSTIC BARRIER IS COATED ON ONE SIDE OF A WALL TO EFFECTIVELY ATTENUATE AND REFLECT ACOUSTIC ENERGY IMPINGING THE WALL''S OPPOSITE SIDE. SPRAYING OR BRUSHING ON A LAYER OF A SEMILIQUID SOUND ABSORBING MATERIAL AND COVERING THE SOUND ABSORBING MATERIAL AFTER IT HAS SOLIDIFIED WITH A SPRAYED-ON ADHESIVE RESIN SEPTUM ALLOWS A COMPLETE CONTINUOUS COVERING OF A WALL SURFACE IRRESPEC- TIVE OF ITS CONFIGURATION. THUSLY, RIGID MOUNTING DEVICES WHICH OTHERWISE ACT AS SOUND CONDUITS ARE ELIMINATED AND BY APPLYING SUCCESSIVE LAYERS OF THE SOUND ABSORBING MATERIAL AND SEPTUMS, A HIGHLY EFFECTIVE ACOUSTIC BARRIER IS FABRICATED AT MINIMAL COST.
Inventors
- 👤 M Lepor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:21
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/62; E04B1/74; E04B1/82
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |