Heat and smoke vent
Abstract
Abstract 1. A VENT FOR HEAT AND SMOKE ADAPTED TO BE MOUNTED ON A ROOF OF A BUILDING OR LIKE STRUCTURE, COMPRISING: A. A CURB ADAPTED TO BE MOUNTED ON A ROOF AND HAVING A VENT OPENING THERETHROUGH; B. A HEAT SOFTENABLE TRANSLUCENT OF TRANSPARENT SYNTHETIC RESINOUS PLASTIC VENT COVER MEANS WHICH IS CAPABLE OF SOFTENING AND SAGGING WHEN HEATED UNDER PREDETERMINED CONDITIONS FOR SAGGING AND DROPPING OUT OF THE VENT OPENING TO OPEN SAME AND ALLOW HEAT AND SMOKE TO ESCAPE THROUGH THE VENT FROM THE AREA IN THE BUILDING THEREBELOW; C. MOUNTING MEANS FOR RELEASABLY MOUNTING SAID VENT COVER MEANS ON SAID CURB; AND D. A SHIELD DISPOSED OVER ONLY THE CENTRAL PORTION OF SAID VENT COVER AND INSULATING SAME FROM COOLING BY RAIN FALLING THEREON, THEREBY ALLOWING THE VENT COVER TO SOFTEN AND DEFORM UNDER SAID PREDETERMINED HEATING CONDITIONS SO AS TO AUTOMATICALLY DISENGAGE SAID COVER FROM SAID MOUNTING MEANS FOR OPENING THE VENT TO ALLOW HEAT AND SMOKE TO ESCAPE. D R A W I N G
Inventors
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Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |