US3702049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for cleaning polluted air
Assignee: Individual
•
Filing: 1970-09-24
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Granted: 1972-11-07
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Expires: 1990-09-24
Abstract
Abstract Device for cleaning polluted air wherein decontaminant granules anchored in adjacent surfaces of sheets extending alongside and spaced from each other. Deformations in adjacent surfaces receive adjacent portions of granules and retain outer portions of granules in air passageway between adjacent surfaces.
Inventors
- 👤 Ewel J Morris Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:47
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/34; B01D53/46; B01D53/48; B01D53/50; B01D53/508; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1089; Y10T156/109
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A device for cleaning polluted air comprising: a. at least two sheets of plastic material extending around and supported by transverse bar-like members with adjacent surfaces thereof extending alongside and spaced from each other to define an air passageway therebetween and with adjacent free ends of said sheets extending downstream of said bar-like members as viewed in the direction of air flow between said sheets, b. decontaminant granules in said air passageway between said adjacent surfaces of said sheets, and c. there being deformations in said adjacent surfaces receiving and attaching adjacent portions of said granules to said adjacent surfaces and retaining the outer portions of said granules in the path of movement of air between said adjacent surfaces.
Claim 2
Independent Claim
119 words
A device for cleaning polluted air comprising: a. at least two sheets of plastic material extending around and supported by transverse bar-like members with adjacent surfaces thereof extending alongside and spaced from each other to define an air passageway therebetween and with adjacent free ends of said sheets extending downstream of said bar-like members as viewed in the direction of air flow between said sheets, b. decontaminant granules in said air passageway between said adjacent surfaces of said sheets, and c. there being deformations in said adjacent surfaces receiving and attaching adjacent portions of said granules to said adjacent surfaces and retaining the outer portions of said granules in the path of movement of air between said adjacent surfaces.
References Cited (Backward Citations)
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US2979157A
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US3638403A
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US3611678A
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US3664095A
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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) | 1975-11-07 | 1976-05-08 | 1976-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-07 | 1980-05-08 | 1980-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-07 | 1984-05-08 | 1984-11-07 | $7700.00 | Window Closed / Lapsed |