Patent US2874199A successfully refreshed from Google Patents.
US2874199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractional crystallization process and apparatus
Assignee: Phillips Petroleum Co
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Filing: 1954-12-22
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Granted: 1959-02-17
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Expires: 1974-12-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Tarr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:06
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS FOR SEPARATING A COMPONENT FROM A LIQUID MULTI-COMPONENT MIXTURE WHICH COMPRISES PASSING CRYSTALS, FORMED BY SAID COMPONENT BY COOLING SAID MIXTURE, INTO A PURIFICATION ZONE; MOVING SAID CRYSTALS THROUGH SAID PURIFICATION ZONE TOWARD A MELTING ZONE; IN AN INTERMEDIATE PORTION OF SAID PURIFICATION ZONE PASSING SAID CRYSTALS THROUGH A PLURALITY OF ADJACENT PASSAGEWAYS HAVING WALLS FORMED OF A MATERIAL OF HIGH HEAT CONDUCTIVITY; MOVING SAID CRYSTALS FROM SAID PASSAGEWAYS INTO SAID MELTING ZONE; MELTING CRYSTALS IN SAID MELTING ZONE; DISPLACING AT LEAST A PORTION OF THE RESULTING MELT INTO SAID MOVING CRYSTALS; TRANSFERRING HEAT THROUGH SAID MATERIAL OF HIGH HEAT CONDUCTIVITY FROM SAID MELTING ZONE THROUGH SAID PURIFICATION ZONE UPSTREAM CRYSTAL WISE FROM SAID MELTING ZONE; AND REMOVING A PRODUCT FROM SAID MELTING ZONE.
Claim 2
Dependent Claim
126 words
A PROCESS FOR SEPARATING A COMPONENT FROM A LIQUID MULTI-COMPONENT MIXTURE WHICH COMPRISES PASSING CRYSTALS, FORMED BY SAID COMPONENT BY COOLING SAID MIXTURE, INTO A PURIFICATION ZONE; MOVING SAID CRYSTALS THROUGH SAID PURIFICATION ZONE TOWARD A MELTING ZONE; IN AN INTERMEDIATE PORTION OF SAID PURIFICATION ZONE PASSING SAID CRYSTALS THROUGH A PLURALITY OF ADJACENT PASSAGEWAYS HAVING WALLS FORMED OF A MATERIAL OF HIGH HEAT CONDUCTIVITY; MOVING SAID CRYSTALS FROM SAID PASSAGEWAYS INTO SAID MELTING ZONE; MELTING CRYSTALS IN SAID MELTING ZONE; DISPLACING AT LEAST A PORTION OF THE RESULTING MELT INTO SAID MOVING CRYSTALS; TRANSFERRING HEAT THROUGH SAID MATERIAL OF HIGH HEAT CONDUCTIVITY FROM SAID MELTING ZONE THROUGH SAID PURIFICATION ZONE UPSTREAM CRYSTAL WISE FROM SAID MELTING ZONE; AND REMOVING A PRODUCT FROM SAID MELTING ZONE.
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |