US2886603A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crystallization process
Assignee: Phillips Petroleum Co
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Filing: 1954-11-22
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Granted: 1959-05-12
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Expires: 1974-11-22
Abstract
No abstract record available.
Inventors
- 👤 Russell O Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:13
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0004; B01D9/0009
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR PRODUCING CRYSTALS FROM A FEED CONSISTING ESSENTIALLY OF A MULTI-COMPONENT LIQUID MIXTURE WHICH COMPRISES INTRODUCING SAID FEED INTO THE UPPER PORTION OF A CRYSTALLIZATION ZONE; MAINTAINING IN SAID ZONE A BODY OF LIQUID REFRIGERANT IMMISCIBLE WITH SAID MIXTURE AND OF LOWER SPECIFIC GRAVITY; MAINTAINING THE TEMPERATURE OF SAID BODY OF REFRIGERANT BELOW THE INITIAL FREEZING POINT OF SAID MIXTURE; ALLOWING SAID MIXTURE TO GRAVITATE IN SUBDIVIDED FORM DOWNWARDLY THROUGH SAID BODY OF REFRIGERANT, THEREBY CAUSING CRYSTALS OF ONE COMPONENT OF SAID MIXTURE TO FORM; AND REMOVING SAID CRYSTALS FROM SAID ZONE AS THE PRODUCT OF THE PROCESS.
Claim 2
Dependent Claim
100 words
A PROCESS FOR PRODUCING CRYSTALS FROM A FEED CONSISTING ESSENTIALLY OF A MULTI-COMPONENT LIQUID MIXTURE WHICH COMPRISES INTRODUCING SAID FEED INTO THE UPPER PORTION OF A CRYSTALLIZATION ZONE; MAINTAINING IN SAID ZONE A BODY OF LIQUID REFRIGERANT IMMISCIBLE WITH SAID MIXTURE AND OF LOWER SPECIFIC GRAVITY; MAINTAINING THE TEMPERATURE OF SAID BODY OF REFRIGERANT BELOW THE INITIAL FREEZING POINT OF SAID MIXTURE; ALLOWING SAID MIXTURE TO GRAVITATE IN SUBDIVIDED FORM DOWNWARDLY THROUGH SAID BODY OF REFRIGERANT, THEREBY CAUSING CRYSTALS OF ONE COMPONENT OF SAID MIXTURE TO FORM; AND REMOVING SAID CRYSTALS FROM SAID ZONE AS THE PRODUCT OF THE PROCESS.
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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |