US2813099A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystal purification process
Assignee: Phillips Petroleum Co
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Filing: 1953-11-16
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Granted: 1957-11-12
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Expires: 1973-11-16
Abstract
No abstract record available.
Inventors
- 👤 John A Weedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:27
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/06; B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0013; B01D9/004; B01D9/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A PROCESS FOR SEPARATING A COMPONENT FROM A LIQUID MULTI-COMPONENT MIXTURE WHICH COMPRISES PASSING A COMPACT MASS OF CRYSTALS, FORMED BY SAID COMPONENT BY COOLING SAID MIXTURE, THROUGH A PURIFICATION ZONE TOWARD A MELTING ZONE; MELTING AT LEAST A PORTION OF SAID CRYSTALS IN SAID MELTING ZONE: INTRODUCING A SOLVENT INTO SAID MELTING ZONE; PASSING AT LEAST A PORTION OF THE RESULTING MIXTURE COMPRISING MELT AND SOLVENT COUNTERCURRENTLY THROUGH SAID MASS OF CRYSTALS, AND RECOVERING A PURIFIED PRODUCT FROM SAID MELTING ZONE.
Claim 2
Dependent Claim
82 words
A PROCESS FOR SEPARATING A COMPONENT FROM A LIQUID MULTI-COMPONENT MIXTURE WHICH COMPRISES PASSING A COMPACT MASS OF CRYSTALS, FORMED BY SAID COMPONENT BY COOLING SAID MIXTURE, THROUGH A PURIFICATION ZONE TOWARD A MELTING ZONE; MELTING AT LEAST A PORTION OF SAID CRYSTALS IN SAID MELTING ZONE: INTRODUCING A SOLVENT INTO SAID MELTING ZONE; PASSING AT LEAST A PORTION OF THE RESULTING MIXTURE COMPRISING MELT AND SOLVENT COUNTERCURRENTLY THROUGH SAID MASS OF CRYSTALS, AND RECOVERING A PURIFIED 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) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |