US3320404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating ceiling construction and combined heating and ventilating panel units therefor
Assignee: Armstrong World Industries Inc
•
Filing: 1965-01-19
•
Granted: 1967-05-16
•
Expires: 1985-01-19
Abstract
No abstract record available.
Inventors
- 👤 Henry J Roux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:55
CPC Classifications
F; F24; F24D; F24D5/00; F24D5/02; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/068; F24F7/00; F24F7/04; F24F7/06; F24F7/08; F24F7/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A COMBINATION HEATING AND VENTILATING CEILING PANEL UNIT COMPRISING A VENTILATING CEILING PANEL PROVIDED WITH AIR VENTILATING HOLES FOR METERING AIR FROM A PRIMARY PLENUM TO A ROOM BELOW, IMPERFORATE MEANS SPACED FROM THE BACK OF SAID VENTILATING CEILING PANEL AND DEFINING A SECONDARY PLENUM CHAMBER THEREWITH, A HEATING ELEMENT POSITIONED WITHIN SAID SECONDARY PLENUM CHAMBER, AND PASSAGE MEANS WHEREBY CONDITIONED AIR FROM THE PRIMARY PLENUM MAY BE DIRECTED INTO HEAT EXCHANGE RELATIONSHIP WITH SAID HEATING MEANS PRIOR TO ITS PASSAGE THROUGH THE AIR VENTILATING HOLES.
Claim 2
Dependent Claim
86 words
A COMBINATION HEATING AND VENTILATING CEILING PANEL UNIT COMPRISING A VENTILATING CEILING PANEL PROVIDED WITH AIR VENTILATING HOLES FOR METERING AIR FROM A PRIMARY PLENUM TO A ROOM BELOW, IMPERFORATE MEANS SPACED FROM THE BACK OF SAID VENTILATING CEILING PANEL AND DEFINING A SECONDARY PLENUM CHAMBER THEREWITH, A HEATING ELEMENT POSITIONED WITHIN SAID SECONDARY PLENUM CHAMBER, AND PASSAGE MEANS WHEREBY CONDITIONED AIR FROM THE PRIMARY PLENUM MAY BE DIRECTED INTO HEAT EXCHANGE RELATIONSHIP WITH SAID HEATING MEANS PRIOR TO ITS PASSAGE THROUGH THE AIR VENTILATING HOLES.
References Cited (Backward Citations)
CA675066A
Cited
GB654677A
Cited
US2615115A
Cited
US2677749A
Cited
US2751198A
Cited
GB685358A
Cited
US3143637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |