US3303771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilated ceiling construction
Assignee: ROBERT J SIGEL Inc
•
Filing: 1965-02-11
•
Granted: 1967-02-14
•
Expires: 1985-02-11
Abstract
No abstract record available.
Inventors
- 👤 Nesher Alexander
- 👤 John K Henderson
- 👤 Robert J Sigel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:37
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/04; E04B9/0478; F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F7/10; Y; Y10; Y10S; Y10S55/00; Y10S55/29
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A CLEAN ROOM, THE COMBINATION COMPRISING UPPER AND LOWER CEILINGS FORMING AN AIR SUPPLY UPPER PLENUM CHAMBER, SAID LOWER CEILING INCLUDING AN OPEN FRAMEWORK, AND A PLURALITY OF AIR DIFFUSER PANELS CARRIED BY SAID FRAMEWORK AND COVERING THE OPENINGS THEREIN, EACH OF SAID PANELS HAVING A PLANAR PERIPHERALLY EXTENDING RIM, SECTIONS OF THE PANEL AREA WITHIN SAID RIM RAISED ABOVE THE PLANE OF THE RIM THEREBY TO PROVIDE PANEL STIFFENING CORRUGATIONS, AND NOZZLES DEPENDING FROM SAID RAISED SECTIONS OF THE PANEL AREA, SAID PANELS CONJOINTLY AFFORDING A MAZE OF NOZZLES DISTRIBUTED OVER SUBSTANTIALLY THE ENTIRE CEILING AREA, UPPER AND LOWER FLOORS FORMING AND AIR
Claim 2
Dependent Claim
105 words
IN A CLEAN ROOM, THE COMBINATION COMPRISING UPPER AND LOWER CEILINGS FORMING AN AIR SUPPLY UPPER PLENUM CHAMBER, SAID LOWER CEILING INCLUDING AN OPEN FRAMEWORK, AND A PLURALITY OF AIR DIFFUSER PANELS CARRIED BY SAID FRAMEWORK AND COVERING THE OPENINGS THEREIN, EACH OF SAID PANELS HAVING A PLANAR PERIPHERALLY EXTENDING RIM, SECTIONS OF THE PANEL AREA WITHIN SAID RIM RAISED ABOVE THE PLANE OF THE RIM THEREBY TO PROVIDE PANEL STIFFENING CORRUGATIONS, AND NOZZLES DEPENDING FROM SAID RAISED SECTIONS OF THE PANEL AREA, SAID PANELS CONJOINTLY AFFORDING A MAZE OF NOZZLES DISTRIBUTED OVER SUBSTANTIALLY THE ENTIRE CEILING AREA, UPPER AND LOWER FLOORS FORMING AND AIR
References Cited (Backward Citations)
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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) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |