US3659402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple screen construction
Assignee: PARISER BERTRAM
•
Filing: 1970-03-30
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Granted: 1972-05-02
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Expires: 1990-03-30
Abstract
Abstract A screen network construction for air pollution control apparatus comprising a plurality of screens arranged in abutting relationship. The screens are secured tightly together to prevent clogging and to form countless tortuous paths for water and air to mix.
Inventors
- 👤 Howard Alliger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:06
CPC Classifications
B; B01; B01D; B01D45/00; B01D45/04; B01D45/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
102 words
An air pollution control apparatus for cleaning gas and removing contaminants therefrom comprising a conduit open at a forward end for the gas to be cleaned, a screen network, including a plurality of superposed planar wire mesh metallic screens disposed and supported in said conduit and extending angularly rearwardly downwardly and transverse to the conduit, and liquid spray means disposed in said conduit forwardly of said screen network for continuously spraying said screen network, and means tightly securing adjacent of said screens to each other under compression, and an epoxy coating covering each screen preventing corrosion and adhesively bonding said screens together.
Claim 2
Dependent Claim
102 words
An air pollution control apparatus for cleaning gas and removing contaminants therefrom comprising a conduit open at a forward end for the gas to be cleaned, a screen network, including a plurality of superposed planar wire mesh metallic screens disposed and supported in said conduit and extending angularly rearwardly downwardly and transverse to the conduit, and liquid spray means disposed in said conduit forwardly of said screen network for continuously spraying said screen network, and means tightly securing adjacent of said screens to each other under compression, and an epoxy coating covering each screen preventing corrosion and adhesively bonding said screens together.
Claim 3
Dependent Claim
57 words
An air pollution control apparatus according to claim 1, wherein each of said screens have a smaller mesh size than the screen immediately before it in the direction of movement of said gas being cleaned and being closely spaced to each screen immediately adjacent thereto, said securing means further including staples holding said screens together under compression.
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |