Patent US3726780A successfully refreshed from Google Patents.
US3726780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroflotation apparatus
Assignee: Illinois National Bank and Trust Co
•
Filing: 1971-05-14
•
Granted: 1973-04-10
•
Expires: 1991-05-14
Abstract
Abstract A tank, having a height several times its effective diameter, has a plurality of horizontal electrodes disposed throughout its entire height. Conduits and controls are provided for downflow of liquid to be purified in a nonturbulent manner. Electrolysis of the liquid causes gas bubbles to flow upwardly. This apparatus creates a nonturbulent flow of liquid directly counter to the flow of gas bubbles for a substantial vertical distance. In one embodiment the tank is a cylinder. while in another it has downwardly converging sides.
Inventors
- 👤 W Harnden
- 👤 E Morrill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:04
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/1437; B03D1/02; B03D1/028; B03D1/1443; B03D1/1462; B03D1/1493; C; C02; C02F; C02F1/00; C02F1/46; C02F1/461; C02F1/465; C02F1/46104; C02F1/46109; C02F1/52
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |