Patent US20040138744A1 successfully refreshed from Google Patents.
US3642618A
Expired / Lapsed
US
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Continuous clarification-filtration method
Assignee: Individual
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Filing: 1968-10-07
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Granted: 1972-02-15
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Expires: 1988-10-07
Abstract
Abstract Method and apparatus to improve the adhesion between the air or gas bubbles used in a flotation clarifier and the floc already formed with the use of one or more chemicals or coagulant aids, by adding the necessary electrical charge to said air or gas bubbles in order to make them adhere more efficiently to said floc.
Inventors
- 👤 Rene Narcisco Silva
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:16
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/24; B; B03; B03D; B03D1/00; B03D1/14; B03D1/1412; B03D1/1437; B03D1/1443; B03D1/1456; B03D1/1462; B03D1/1481; B03D1/1487; B03D1/1493; B03D1/24; B03D1/245; B03D1/26; C02F1/46; C02F1/461; C02F1/465; C02F1/52
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
17 words
providing means to insure uniform mixing of said gas bubbles throughout said liquid to be clarified; and
Claim 2
Dependent Claim
20 words
The method of claim 1 wherein said powdered chemicals are provided with the proper electrical charge by an electrostatic charger.
Claim 3
Dependent Claim
21 words
The method of claim 2 wherein the flow of gas bubbles is countercurrent the flow of liquid being clarified of matter.
Claim 4
Dependent Claim
42 words
subsequently removing from the surface of said liquid the conglomerate formed by adherence of said now flocculated matter to be removed from said liquid with the powdered chemicals introduced into said liquid in said gas bubbles, thus leaving a clarified liquid behind.
Claim 5
Dependent Claim
32 words
The method of claim 1 wherein said matter to be removed from said liquid is partially or wholly flocculated at the time of the introduction thereinto of said powdered chemical-containing gas bubbles.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |