US3828935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for removing floated material in flotation processes
Assignee: Suez International SAS
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Filing: 1972-04-17
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Granted: 1974-08-13
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Expires: 1992-04-17
Abstract
Abstract Device for giving a reinforced structure to the cake of floated materials in flotation processes during the operation of removing the floated materials. The device comprises essentially a grillage of vertical walls inserted in the liquid containing the materials in suspension to be floated.
Inventors
- 👤 J Rovel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:30
CPC Classifications
B; B03; B03B; B03B11/00; B03D; B03D1/00; B03D1/14; B03D1/1443; B03D1/1462; B03D1/1481; B03D1/1487
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A device for removing floated materials from a body of liquid in a flotation separation process comprising a tank, a grillage in the upper portion of said tank, a sloping overflow spout having liquid outlet means at its lowest point for maintaining the liquid level in said tank below the upper surface of said grillage, collection means mounted in the immediate proximity of the upper surface of said grillage for moving the upper portion of the floated materials into said overflow spout, and screw conveyor means for moving said floated materials downwardly alonG said overflow spout to said outlet means.
Claim 2
Independent Claim
100 words
A device for removing floated materials from a body of liquid in a flotation separation process comprising a tank, a grillage in the upper portion of said tank, a sloping overflow spout having liquid outlet means at its lowest point for maintaining the liquid level in said tank below the upper surface of said grillage, collection means mounted in the immediate proximity of the upper surface of said grillage for moving the upper portion of the floated materials into said overflow spout, and screw conveyor means for moving said floated materials downwardly alonG said overflow spout to said outlet means.
Claim 3
Dependent Claim
21 words
The device claimed in claim 1 wherein said grillage comprises a plurality of juxtaposed tubes defining vertical ducts of circular section.
Claim 4
Dependent Claim
22 words
The device claimed in claim 1 wherein said grillage comprises a plurality of juxtaposed orthogonal plates defining vertical ducts of square section.
Claim 5
Dependent Claim
22 words
The device claimed in claim 1 wherein said grillage comprises a plurality of juxtaposed orthogonal plates defining vertical ducts of rectangular section.
Claim 6
Dependent Claim
29 words
The device claimed in claim 1 wherein said grillage is in the form of a honeycomb formed by a plurality of juxtaposed plates defining vertical ducts of hexagonal section.
Claim 7
Dependent Claim
21 words
The device claimed in claim 1 wherein the grillage is secured to the wall of said tank in a non-rigid manner.
Claim 8
Dependent Claim
14 words
The device claimed in claim 1 wherein said outlet means comprises an overflow pipe.
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |