Patent US3275101A successfully refreshed from Google Patents.
US3275101A
Expired / Lapsed
US
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Acoustic structural unit
Assignee: GEORGE BRADLEY DAVIS JR
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Filing: 1963-12-16
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Granted: 1966-09-27
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Expires: 1983-12-16
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Morrissey
- 👤 Jr George Bradley Davis
- 👤 Harold H Short
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:04
CPC Classifications
E; E04; E04B; E04B5/00; E04B5/02; E04B5/04; E04B5/043; E04B1/00; E04B1/62; E04B1/74; E04B1/82; E04B1/84; E04B1/86; E04C; E04C2/00; E04C2/02; E04C2/04; E04C2/044; E04B2001/8457; E04B2001/8476; E04B2001/848; E04B2001/8485; E04B2001/849
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
AN ACOUSTIC LOAD BEARING STRUCTURAL UNIT WHICH COMPRISES AN ELONGATED FLEXURAL SLAB OF REINFORCED CONCRETE HAVING A PLURALITY OF ELONGATE CAVITIES FORMED THEREIN IN TRANSVERSELY SPACED SUBSTANTIALLY PARALLEL RELATIONSHIP WITH RESPECT TO EACH OTHER, EACH OF THE CAVITIES HAVING ELONGATE APERTURE MEANS FOMED THROUGH A WALLL OF THE CAVITY FORMING A PERFORATED SURFACE AND ESTABLISHING COMMUNICATION BETWEEN THE INSIDE OF THE CAVITY AND THE ATMOSPHERE, THE RATIO OF THE TOTAL SURFACE AREA OF THE APERTURES TO THE TOTAL AREA OF THE PERFORATED SURFACE BEING IN THE RANGE FROM ABOUT 7 TO ABOUT 15 PERCENT, FIBROUS SOUND ABSORBING MATERIAL IN EACH OF SAID CAVITIES, SAID FIBROUS MATERIAL OCCUPYING THROUGHOUT ITS LENGTH A PORTION ONLY OF THE CROSS-SECTIONAL AREA OF SAID CAVITY, AND A SEPTUM INSERTED IN EACH OF THE CAVITIES ADJACENT THE SIDE OF SAID SOUND ABSORBING MATERIAL DISTAL TO SAID APERTURE MEANS FOR CONTROLLING THE EFFECTIVE VOLUMES OF THE CAVITIES IN COMMUNICATION WITH THE ATMOSPHERE.
Claim 2
Dependent Claim
155 words
AN ACOUSTIC LOAD BEARING STRUCTURAL UNIT WHICH COMPRISES AN ELONGATED FLEXURAL SLAB OF REINFORCED CONCRETE HAVING A PLURALITY OF ELONGATE CAVITIES FORMED THEREIN IN TRANSVERSELY SPACED SUBSTANTIALLY PARALLEL RELATIONSHIP WITH RESPECT TO EACH OTHER, EACH OF THE CAVITIES HAVING ELONGATE APERTURE MEANS FOMED THROUGH A WALLL OF THE CAVITY FORMING A PERFORATED SURFACE AND ESTABLISHING COMMUNICATION BETWEEN THE INSIDE OF THE CAVITY AND THE ATMOSPHERE, THE RATIO OF THE TOTAL SURFACE AREA OF THE APERTURES TO THE TOTAL AREA OF THE PERFORATED SURFACE BEING IN THE RANGE FROM ABOUT 7 TO ABOUT 15 PERCENT, FIBROUS SOUND ABSORBING MATERIAL IN EACH OF SAID CAVITIES, SAID FIBROUS MATERIAL OCCUPYING THROUGHOUT ITS LENGTH A PORTION ONLY OF THE CROSS-SECTIONAL AREA OF SAID CAVITY, AND A SEPTUM INSERTED IN EACH OF THE CAVITIES ADJACENT THE SIDE OF SAID SOUND ABSORBING MATERIAL DISTAL TO SAID APERTURE MEANS FOR CONTROLLING THE EFFECTIVE VOLUMES OF THE CAVITIES IN COMMUNICATION WITH THE ATMOSPHERE.
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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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |