Patent US3663413A successfully refreshed from Google Patents.
US3663413A
Expired / Lapsed
US
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Device for electrolytically inducing flocculation for water treatment plants
Assignee: Westinghouse Electric Corp
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Filing: 1970-02-06
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Granted: 1972-05-16
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Expires: 1990-02-06
Abstract
Abstract A DEVICE FOR ARTIFICIALLY INDUCING FLOCCULATION TO AID IN SEWAGE TREATMENT PROCESSES; WHICH DEVICE COMPRISES SACRIFICIAL ELECTRODES SUSPENDED IN AN AERATION TANK ABOVE THE AIR DIFFUSERS. THE ELECTRODES PRODUCE METALLIC HYDROXIDES IN SOLUTION WHICH ACT AS FLOCCULATING AGENTS ON SEWAGE PARTICLES. THE AIR DIFFUSERS ACT TO KEEP THE ELECTRODES CLEAN AND TO MIX THE METALLIC HYDROXIDES WITH THE SEWAGE PARTICLES.
Inventors
- 👤 Anthony R Marmo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:53
CPC Classifications
C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; C02F3/1205; C02F3/1215; C02F1/00; C02F1/46; C02F1/461; C02F1/463; C02F1/465; C02F1/46104; C02F1/46109; C02F2001/46119; 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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |