Patent US4809981A successfully refreshed from Google Patents.
Patent EP0621596A2 successfully refreshed from Google Patents.
US3736727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pollution reduction system
Assignee: Individual
•
Filing: 1971-10-06
•
Granted: 1973-06-05
•
Expires: 1991-10-06
Abstract
Abstract An air pollution reduction system embodying dielectric means to induce electrostatic forces in the path of a polluted fluid stream to cause precipitation of solids in said stream.
Inventors
- 👤 W Shriner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:12
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/28; B03C3/30; Y; Y10; Y10S; Y10S55/00; Y10S55/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
28 words
The device recited in claim 1, in which the body is comprised of a series of units each containing vanes and which are nested together end to end.
Claim 2
Dependent Claim
14 words
The device recited in claim 2, in which each unit includes a collection chamber.
Claim 3
Dependent Claim
19 words
The device recited in claim 3, in which there is a mass of fibrous material in each collection chamber.
Claim 4
Dependent Claim
15 words
The device recited in claim 1, in which the vanes are uniformily spaced apart circumferentially.
Claim 5
Dependent Claim
197 words
An air pollution reduction device for placement in the path of a pollutant loaded stream of gases comprising, in combination, a tubular body comprised of a series of like units nested end to end and having an open gas inlet end and an open gas outlet end, a first series of stationary vanes disposed within said tubular body adjacent the inlet end, a collection chamber downstream from said vanes, a second series of stationary vanes disposed within said body in axial alignment with the first series of vanes, a second collection chamber downstream of said second series of vanes, a third series of stationary vanes in said tubular body in axial alignment with the second series, a third collection chamber downstream of said third series of vanes, the vanes in each series being uniformily spaced apart circumferentially and each having a surface of dielctric material, and a mass of fibrous material in each collection chamber, said vanes functioning to generate electrostatic charges in the gases passing thereover resulting in precipitation of pollutants which pollutants are collected in said chambers to remove said pollutants from the gases prior to passage to the outer atmosphere through the outlet end.
Claim 6
Dependent Claim
14 words
The device recited in claim 6, wherein the dieLectric material is comprised of polytetrafluoroethylene.
Claim 7
Dependent Claim
17 words
The device recited in claim 6, in which at least the vanes are formed of ceramic material.
Claim 8
Dependent Claim
21 words
The device recited in claim 6, in which at least the vanes are formed of paper coated with a dielectric mateial.
Claim 9
Dependent Claim
14 words
The device recited in claim 6, in which the vanes have an ovoid configuration.
Claim 10
Dependent Claim
14 words
The device recited in claim 6, in which the vanes have an air-foil configuration.
References Cited (Backward Citations)
CH104528A
Cited
US1632325A
Cited
GB680297A
Cited
US2758666A
Cited
GB792068A
Cited
US2918139A
Cited
US3330284A
Cited
US3394707A
Cited
US3307332A
Cited
US3545179A
Cited
US3563004A
Cited
US3492998A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |