US2804206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating by size and specific gravity solid materials in suspension in a fluid
Assignee: Preparation Industrielle des Combustibles SA
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Filing: 1955-06-03
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Granted: 1957-08-27
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Expires: 1975-06-03
Abstract
No abstract record available.
Inventors
- 👤 Turpin Jacques
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:40
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/32; B03B5/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN THE PROCESS OF TREATING RAW PRODUCTS CONTAINING SOLID PARTICLES OF VARIOUS SIZES AND SPECIFIC GRAVITIES INVOLVING MIXING THE RAW PRODUCT WITH A DENSE SUSPENSION AND SEPARATING THE PRODUCT BY CENTRIFUGATION OF THE DENSE SUSPENSION WITH THE PRODUCT MIXED THEREWITH INTO TWO FRACTIONS, ONE A LIGHT FRACTION FORMED OF PARTICLES ALL OF A SPECIFIC GRAVITY LESS THAN THE SPECIFIC GRAVITY OF SEPARATION AND THE OTHER A HEAVY FRACTION FORMED OF PARTICLES ALL OF A SPECIFIC GRAVITY GREATER THAN THE SPECIFIC GRAVITY OF SEPARATION, THE IMPROVEMENT WHICH COMPRISES FORMING THE SUSPENSION WITH SOLID GRANULAR PRODUCTS HAVING ONLY 40% TO 50% SMALLER THAN 40 MICRONS AND MAINTAINING THE RELATIONSHIP BETWEEN THE SPECIFIC GRAVITY OF SEPARATION AND THE SPECIFIC GRAVITY OF THE DENSE SUSPENSION SUCH THAT THE SPECIFIC GRAVITY OF SEPARATION WILL BE EQUAL TO OR LESS THAN THE SPECIFIC GRAVITY OF THE SUSPENSION.
Claim 2
Dependent Claim
141 words
IN THE PROCESS OF TREATING RAW PRODUCTS CONTAINING SOLID PARTICLES OF VARIOUS SIZES AND SPECIFIC GRAVITIES INVOLVING MIXING THE RAW PRODUCT WITH A DENSE SUSPENSION AND SEPARATING THE PRODUCT BY CENTRIFUGATION OF THE DENSE SUSPENSION WITH THE PRODUCT MIXED THEREWITH INTO TWO FRACTIONS, ONE A LIGHT FRACTION FORMED OF PARTICLES ALL OF A SPECIFIC GRAVITY LESS THAN THE SPECIFIC GRAVITY OF SEPARATION AND THE OTHER A HEAVY FRACTION FORMED OF PARTICLES ALL OF A SPECIFIC GRAVITY GREATER THAN THE SPECIFIC GRAVITY OF SEPARATION, THE IMPROVEMENT WHICH COMPRISES FORMING THE SUSPENSION WITH SOLID GRANULAR PRODUCTS HAVING ONLY 40% TO 50% SMALLER THAN 40 MICRONS AND MAINTAINING THE RELATIONSHIP BETWEEN THE SPECIFIC GRAVITY OF SEPARATION AND THE SPECIFIC GRAVITY OF THE DENSE SUSPENSION SUCH THAT THE SPECIFIC GRAVITY OF SEPARATION WILL BE EQUAL TO OR LESS THAN THE SPECIFIC GRAVITY OF THE SUSPENSION.
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) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |