US3615078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for and method of aerating liquor in large sewage treatment tanks
Assignee: Water Pollution Control Corp
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Filing: 1969-12-03
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Granted: 1971-10-26
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Expires: 1989-12-03
Abstract
Abstract THE AERATION TANK HAS OPPOSITELY-DISPOSED SIDE WALLS AND HAS A SERIES OF BAFFLES SPACED INWARDLY FROM EACH SIDE WALL AND EXTENDING PARALLEL THERETO, EACH BAFFLE TERMINATING A SUBSTANTIAL DISTANCE SHORT OF THE LIQUID LEVEL AND SHORT OF THE BOTTOM OF THE TANK. EXTENDING ALONG THE INNER SIDE OF EACH BAFFLE ABOUT MIDWAY OF THE DEPTH OF THE TANK IS A ROW OF RELATIVELY LOW PRESSURE AIR DIFFUSERS, AND EXTENDING ALONG THE BOTTOM OF THE TANK MIDWAY BETWEEN THE TWO ROWS OF LOW PRESSURE DIFFUSERS IN A ROW OF RELATIVELY HIGH PRESSURE DIFFUSERS.
Inventors
- 👤 Paul M Thayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:30
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/20; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |