US2780360A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removing suspended solids from aqueous liquids
Assignee: Dow Chemical Co
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Filing: 1954-12-17
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Granted: 1957-02-05
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Expires: 1974-12-17
Abstract
No abstract record available.
Inventors
- 👤 Charles K Bon
- 👤 Marshall P Neipert
- 👤 Norman L Piegols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:43
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A METHOD OF SEPARATING A FLOCCULENT PRECIPITATE FROM AN AQUEOUS SUSPENSION THEREOF WHICH IS SUBJECT TO SEDIMENTATION IN A MORE OR LESS QUIESCENT BODY THEREOF WHEREIN AT LEAST A PORTION OF THE FLOC BECOMES BUOYANT, INSTEAD OF SETTLING, DUE TO THE ADHESION OF GAS BUBBLES TO PIECES OF THE FLOC, THE IMPROVEMENT WHICH CONSISTS IN BRINGING INTO CONTACT WITH THE GAS BUBBLE LOADED FLOC PARTICLES, AT THE UPPER EXPOSED SURFACE OF THE SUSPENSION, THE ROUGH FACE OF PIECES OF PLASTIC FOAM HAVING A CLOSED CELL STRUCTURE, THE SAID PLASTIC FOAM BEING IN DISCRETE FLOATNG PIECES WHEREBY THE PLASTIC FOAM DETACHES THE GAS BUBBLES FROM THE FLOC PARTICLES ALLOWING THEM TO SINK IN THE AQUEOUS SUSPENSION AND THE GAS TO ESCAPE BETWEEN THE PIECES OF THE PLASTIC FOAM.
Claim 2
Dependent Claim
128 words
IN A METHOD OF SEPARATING A FLOCCULENT PRECIPITATE FROM AN AQUEOUS SUSPENSION THEREOF WHICH IS SUBJECT TO SEDIMENTATION IN A MORE OR LESS QUIESCENT BODY THEREOF WHEREIN AT LEAST A PORTION OF THE FLOC BECOMES BUOYANT, INSTEAD OF SETTLING, DUE TO THE ADHESION OF GAS BUBBLES TO PIECES OF THE FLOC, THE IMPROVEMENT WHICH CONSISTS IN BRINGING INTO CONTACT WITH THE GAS BUBBLE LOADED FLOC PARTICLES, AT THE UPPER EXPOSED SURFACE OF THE SUSPENSION, THE ROUGH FACE OF PIECES OF PLASTIC FOAM HAVING A CLOSED CELL STRUCTURE, THE SAID PLASTIC FOAM BEING IN DISCRETE FLOATNG PIECES WHEREBY THE PLASTIC FOAM DETACHES THE GAS BUBBLES FROM THE FLOC PARTICLES ALLOWING THEM TO SINK IN THE AQUEOUS SUSPENSION AND THE GAS TO ESCAPE BETWEEN THE PIECES OF THE PLASTIC FOAM.
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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |