US3435911A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustic curb
Assignee: Greenheck Fan and Ventilator Corp
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Filing: 1966-11-14
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Granted: 1969-04-01
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Expires: 1986-11-14
Abstract
No abstract record available.
Inventors
- 👤 Robert C Greenheck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:11
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/075; F24F13/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN ACOUSTIC CURB FOR A FAN COMPRISING A CURB BODY HAVING AN INLET AND AN OUTLET AND HAVING OPPOSED SIDE WALLS, A PAIR OF UPWARDLY EXTENDING SUPPORT FLANGES DISPOSED ALONG THE UPPER PORTIONS OF THE INNER FACES OF A PAIR OF OPPOSED SIDE WALLS, EACH FLANGE HAVING A SERIES OF OPEN-ENDED SLOTS PREDETERMINEDLY SPACED THEREALONG, A PLURALITY OF SUSPENDED BAFFLES, EACH BAFFLE HAVING HIGH SOUND ABSORPTION CHARACTERISTICS AND BEING SUBSTANTIALLY IN THE FORM OF AN ELONGATED PANEL HAVING END PLATES, RESILIENT MEMBERS ATTACHED TO THE END PLATES OF EACH PANEL AND REMOVABLY INTERLOCKED IN THEIR RESPECTIVE OPEN-ENDED SLOTS, SAID PLURALITY OF BAFFLES BEING SUSPENDED WITHIN SAID CURB TO DEFINE UNINTERRUPTED SUBSTANTIALLY STRAIGHT FLOW PATHS BETWEEN SAID INLET AND OUTLET.
Claim 2
Dependent Claim
119 words
AN ACOUSTIC CURB FOR A FAN COMPRISING A CURB BODY HAVING AN INLET AND AN OUTLET AND HAVING OPPOSED SIDE WALLS, A PAIR OF UPWARDLY EXTENDING SUPPORT FLANGES DISPOSED ALONG THE UPPER PORTIONS OF THE INNER FACES OF A PAIR OF OPPOSED SIDE WALLS, EACH FLANGE HAVING A SERIES OF OPEN-ENDED SLOTS PREDETERMINEDLY SPACED THEREALONG, A PLURALITY OF SUSPENDED BAFFLES, EACH BAFFLE HAVING HIGH SOUND ABSORPTION CHARACTERISTICS AND BEING SUBSTANTIALLY IN THE FORM OF AN ELONGATED PANEL HAVING END PLATES, RESILIENT MEMBERS ATTACHED TO THE END PLATES OF EACH PANEL AND REMOVABLY INTERLOCKED IN THEIR RESPECTIVE OPEN-ENDED SLOTS, SAID PLURALITY OF BAFFLES BEING SUSPENDED WITHIN SAID CURB TO DEFINE UNINTERRUPTED SUBSTANTIALLY STRAIGHT FLOW PATHS BETWEEN SAID INLET AND OUTLET.
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) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |