US3147212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for rinsing fine particles covered with a suspension
Assignee: Stamicarbon BV
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Filing: 1961-07-27
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Granted: 1964-09-01
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Expires: 1981-07-27
Abstract
No abstract record available.
Inventors
- 👤 Christianus W J Van Koppen
- 👤 Freek J Fontein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:08
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/44; B03B5/447
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
107 words
PROCESS FOR RINSING FINE PARTICLES COVERED WITH A SUSPENSION COMPRISING THE STEPAS OF: PASSING THE PARTICLES IN LAYER FORMATION OVER A SCREEN, THE LAYER THICKNESS BEING A MULTIPLE OF THE PARTICLE DIMENSIONS; AND SPREADING A RINSING LIQUID OUT IN A FILM AND SEPARATING THE FILM INTO DROPS; DEPOSITING THESE DROPS OVER THE FULL WIDTH OF THE LAYER IN AN AMOUNT SUFFICIENT TO WET SUBSTANTIALLY ALL THE UPPER SURFACE OF THE LAYER; THE LIQUID DROPS STRIKING THE UPPER SURFACE OF THE LAYER WITH A SUFFICIENTLY SMALL FORCE TO PROVIDE, AT MAXIMUM, A NEGLEGIBLE STIRRING THEREOF, AND DISCHARGING THE LIQUID THROUGH THE SCREEN WITHOUT FORMING A SUSPENSION BATH THEREON.
Claim 2
Dependent Claim
107 words
PROCESS FOR RINSING FINE PARTICLES COVERED WITH A SUSPENSION COMPRISING THE STEPAS OF: PASSING THE PARTICLES IN LAYER FORMATION OVER A SCREEN, THE LAYER THICKNESS BEING A MULTIPLE OF THE PARTICLE DIMENSIONS; AND SPREADING A RINSING LIQUID OUT IN A FILM AND SEPARATING THE FILM INTO DROPS; DEPOSITING THESE DROPS OVER THE FULL WIDTH OF THE LAYER IN AN AMOUNT SUFFICIENT TO WET SUBSTANTIALLY ALL THE UPPER SURFACE OF THE LAYER; THE LIQUID DROPS STRIKING THE UPPER SURFACE OF THE LAYER WITH A SUFFICIENTLY SMALL FORCE TO PROVIDE, AT MAXIMUM, A NEGLEGIBLE STIRRING THEREOF, AND DISCHARGING THE LIQUID THROUGH THE SCREEN WITHOUT FORMING A SUSPENSION BATH THEREON.
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) | 1967-09-01 | 1968-03-02 | 1968-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-01 | 1972-03-02 | 1972-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-01 | 1976-03-02 | 1976-09-01 | $7700.00 | Window Closed / Lapsed |