US2817441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating mixture of solid particles into fractions by means of a hydrocyclone
Assignee: Stamicarbon BV
•
Filing: 1953-06-09
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Granted: 1957-12-24
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Expires: 1973-06-09
Abstract
No abstract record available.
Inventors
- 👤 Jan N J Leeman
- 👤 Freerk J Fontein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:56
CPC Classifications
B; B03; B03B; B03B9/00; B03B9/005; B03B5/00; B03B5/28; B03B5/30; B03B5/32; B03B5/34; B04; B04C; B04C5/00; B04C5/08; B04C5/081
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS OF SEPARATING A MIXTURE OF SOLID PARTICLES INTO FRACTIONS, WHICH COMPRISES THE STEPS OF CONTINUOUSLY FEEDING THE MIXTURE TOGETHER WITH A LILQUID MEDIUM UNDER PRESSURE TANGENTIALLY INTO A HYDROCYLONE HAVING AN AXIAL LENGTH OF AT LEAST 0.7 METRE, WHEREBY SEPARATED FRACTIONS ARE DISCHARGED FROM AXIAL OVERFLOW AND APEX APERTURES AT OPPOSITE ENDS OF SAID HYDROCYCLONE, THE AXIS OF SAID HYDROCYCLONE BEING INCLINED RELATIVE TO THE VERTICAL AT A CONSIDERABLE ANGLE, AND ADJUSTING THE FEED PRESSURE OF SAID MIXTURE AND MEDIUM TO A VALUE, EXPRESED IN HEAD OF FEED, SUBSTANTIALLY LESS THAN SIX TIMES THE AXIAL LENGTH OF SAID HYDROCYCLONE BUT LARGE ENOUGH TO MAINTAIN A CENTRAL AIR COLUMN IN SAID HYDROCYCLONE.
Claim 2
Dependent Claim
113 words
A PROCESS OF SEPARATING A MIXTURE OF SOLID PARTICLES INTO FRACTIONS, WHICH COMPRISES THE STEPS OF CONTINUOUSLY FEEDING THE MIXTURE TOGETHER WITH A LILQUID MEDIUM UNDER PRESSURE TANGENTIALLY INTO A HYDROCYLONE HAVING AN AXIAL LENGTH OF AT LEAST 0.7 METRE, WHEREBY SEPARATED FRACTIONS ARE DISCHARGED FROM AXIAL OVERFLOW AND APEX APERTURES AT OPPOSITE ENDS OF SAID HYDROCYCLONE, THE AXIS OF SAID HYDROCYCLONE BEING INCLINED RELATIVE TO THE VERTICAL AT A CONSIDERABLE ANGLE, AND ADJUSTING THE FEED PRESSURE OF SAID MIXTURE AND MEDIUM TO A VALUE, EXPRESED IN HEAD OF FEED, SUBSTANTIALLY LESS THAN SIX TIMES THE AXIAL LENGTH OF SAID HYDROCYCLONE BUT LARGE ENOUGH TO MAINTAIN A CENTRAL AIR COLUMN IN SAID HYDROCYCLONE.
References Cited (Backward Citations)
US2668620A
Cited
US2639862A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |