Patent US3577709A successfully refreshed from Google Patents.
US3577709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas washer apparatus
Assignee: Hoad & Ass Inc John G
•
Filing: 1968-05-09
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Granted: 1971-05-04
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Expires: 1988-05-09
Abstract
Abstract A combined wet scrubber and clarifier or settling basin for removing dust and other particulate matter from exhaust gases associated with various metallurgical and chemical processes.
Inventors
- 👤 John G Hoad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:16
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
23 words
Apparatus according to claim 1, wherein control means are associated with said first and second means for selectively initiating and interrupting operation thereof.
Claim 2
Dependent Claim
24 words
Apparatus according to claim 1, wherein means are included for delivering effluent from said settling basin to at least some of said spray means.
Claim 3
Dependent Claim
56 words
Apparatus according to claim 1, wherein said liquid spray means are in two sets, one set being positioned in the upper portions of said tower and the other set being positioned below said one set and above the opening for receiving said gases, and means for delivering effluent from said settling basin to said other set.
Claim 4
Dependent Claim
22 words
Apparatus according to claim 4, wherein means are included for delivering liquid from A separate source of liquid to said one set.
Claim 5
Dependent Claim
30 words
Apparatus according to claim 1, wherein an exhaust blower is positioned at the top of said tower for exhausting gases from said tower through the opening at the top thereof.
References Cited (Backward Citations)
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Cited
US917561A
Cited
US2654584A
Cited
US2913116A
Cited
US3353799A
Cited
US3494099A
Cited
US3465504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |