Patent US2815364A successfully refreshed from Google Patents.
US2815364A
Expired / Lapsed
US
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Fractional crystallization process and apparatus
Assignee: Phillips Petroleum Co
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Filing: 1955-02-21
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Granted: 1957-12-03
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Expires: 1975-02-21
Abstract
No abstract record available.
Inventors
- 👤 Richard M Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:16
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004; B01D9/0059
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS FOR SEPERATING LIQUID FROM SLURRIES OF SOLIDS IN LIQUID WHICH COMPRISES INTRODUCING A SLURRY OF SOLID IN LIQUID INTO AN UNRESTRICTED ELONGATED FILTER ZONE, SAID ZONE BEING NORMALLY OPEN AT ITS DISCHARGE END; INITIALLY OBSTRUCTING THE DISCHARGE END OF SAID FILTER ZONE SO AS TO PREVENT SAID SLURRY FROM FLOWING THROUGH THE OPEN END OF SAID ZONE; COMPRESSING SAID SLURRY WITHIN SAID FILTER ZONE SO AS TO SQUEEZE OUT LIQUID AND FORM A COMPACT MASS OF SOLIDS OF UNIFORM CROSS-SECTION THEREIN; REMOVING LIQUID FROM SAID FILTER ZONE; REMOVING THE OBSTRUCTION FROM THE DISCHARGE END OF SAID FILTER ZONE; SLOWLY MOVEING SAID COMPACT MASS OF SOLIDS OF UNIFORM CROSSSECTION THROUGH SAID FILTER ZONE SO THAT SAID SOLIDS ARE EXTRUDED THROUGH THE OPEN END OF SAID FILTER ZONE, RECOVERING SAID EXTRUDED SOLIDS.
Claim 2
Dependent Claim
132 words
A PROCESS FOR SEPERATING LIQUID FROM SLURRIES OF SOLIDS IN LIQUID WHICH COMPRISES INTRODUCING A SLURRY OF SOLID IN LIQUID INTO AN UNRESTRICTED ELONGATED FILTER ZONE, SAID ZONE BEING NORMALLY OPEN AT ITS DISCHARGE END; INITIALLY OBSTRUCTING THE DISCHARGE END OF SAID FILTER ZONE SO AS TO PREVENT SAID SLURRY FROM FLOWING THROUGH THE OPEN END OF SAID ZONE; COMPRESSING SAID SLURRY WITHIN SAID FILTER ZONE SO AS TO SQUEEZE OUT LIQUID AND FORM A COMPACT MASS OF SOLIDS OF UNIFORM CROSS-SECTION THEREIN; REMOVING LIQUID FROM SAID FILTER ZONE; REMOVING THE OBSTRUCTION FROM THE DISCHARGE END OF SAID FILTER ZONE; SLOWLY MOVEING SAID COMPACT MASS OF SOLIDS OF UNIFORM CROSSSECTION THROUGH SAID FILTER ZONE SO THAT SAID SOLIDS ARE EXTRUDED THROUGH THE OPEN END OF SAID FILTER ZONE, RECOVERING SAID EXTRUDED SOLIDS.
References Cited (Backward Citations)
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US2324869A
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US2632314A
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US2688045A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-02 | 1961-06-03 | 1961-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-02 | 1965-06-03 | 1965-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-02 | 1969-06-03 | 1969-12-03 | $7700.00 | Window Closed / Lapsed |