US3782082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling filter system for clean room
Assignee: American Air Filter Co Inc
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Filing: 1971-11-08
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Granted: 1974-01-01
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Expires: 1991-11-08
Abstract
Abstract An air filtering ceiling system having a plurality of flowthrough filtering ceiling panels, each panel being adapted for fluid tight communication with adjacent ceiling panels wherein all of the air entering a plenum enters through the panels, the individual panels being further adapted to be snapped in and out of a ceiling panel support structure.
Inventors
- 👤 T Smith
- 👤 R Pond
- 👤 R Rivers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:00
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/28; B; B01; B01D; B01D46/00; B01D46/10; B01D46/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
163 words
An air filtering ceiling comprising: a. a flow-through ceiling support means extending downwardly, said support means including a frame of generally rectangular shape with downwardly extending sides of generally Z-shaped cross-section and each side further includes an inwardly extending lip at the lower end thereof defining snap receiving means for receiving a flow-through filter assembly in fluid tight communication therewith; b. a flow-through filter assembly, said filter assembly including filter media and a pan assembly, said pan assembly having a pervious bottom and impervious sides including snap means for removably engaging with said snap receiving means of said support means, said snap means being a spring latch having an outwardly turned upper end portion which nests in overlap relationship with said inwardly extending lip; and c. the edges of said filter media being in fluid tight engagement with the sides of said pan assembly whereby generally all the air passing through an air filtering ceiling into a room passes through said filter media.
Claim 2
Dependent Claim
163 words
An air filtering ceiling comprising: a. a flow-through ceiling support means extending downwardly, said support means including a frame of generally rectangular shape with downwardly extending sides of generally Z-shaped cross-section and each side further includes an inwardly extending lip at the lower end thereof defining snap receiving means for receiving a flow-through filter assembly in fluid tight communication therewith; b. a flow-through filter assembly, said filter assembly including filter media and a pan assembly, said pan assembly having a pervious bottom and impervious sides including snap means for removably engaging with said snap receiving means of said support means, said snap means being a spring latch having an outwardly turned upper end portion which nests in overlap relationship with said inwardly extending lip; and c. the edges of said filter media being in fluid tight engagement with the sides of said pan assembly whereby generally all the air passing through an air filtering ceiling into a room passes through said filter media.
Claim 3
Dependent Claim
51 words
The air filtering ceiling of claim 1 wherein said lip has a sharp edge at its extremity, said upwardly extending sides of said pan assembly having an intermediate angle portion with a sealant disposed within said angle portion adaptable to receive said sharp edge of said lip in fluid tight relationship.
Claim 4
Dependent Claim
20 words
The air filtering ceiling of claim 1, said support means being adapted for fluid tight communication with adjacent support means.
Claim 5
Dependent Claim
37 words
The air filtering ceiling of claim 1, said media being of the type that meets requirements of Federal Standard No. 209A, Class 100 for a sterile environment whereby the air filtering ceiling is adaptable for clean rooms.
Claim 6
Dependent Claim
17 words
The air filtering ceiling of claim 1 wherein said filter media is of the extended pleated type.
Claim 7
Dependent Claim
37 words
The air filtering ceiling of claim 1 wherein said filter media is flat and spaced from said porous bottom by spacer means and is adaptable for fluid tight communication with said impervious sides of said pan assembly.
Claim 8
Dependent Claim
25 words
The air filtering ceiling of claim 1 including an edge blank off adapted for spacing between a wall and said sides of said pan assemblies.
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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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |