US2861112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractional crystallization
Assignee: Texaco Inc
•
Filing: 1954-08-31
•
Granted: 1958-11-18
•
Expires: 1974-08-31
Abstract
No abstract record available.
Inventors
- 👤 Edward R Christensen
- 👤 Howard V Hess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:38
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/43; B; B01; B01D; B01D9/00; B01D9/004; B01D9/0059; C07C7/00; C07C7/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A METHOD OF FRACTIONALLY CRYSTALLIZING A LIQUID MIXTURE OF COMPONENTS WHICH FORM A EUTECTIC MIXTURE THE COMPOSITION AND MELTING POINT OF WHICH VARIES WITH THE PRESSURE APPLIED TO SAID LIQUID MIXTURE DURING CRYSTALLIZATION, WHICH COMPRISES SUBJECTING SAID LIQUID MIXTURE TO FRACTIONAL CRYSTALLIZATION UNDER FIRST CONDITIONS OF TEMPERATURE AND A PRESSURE IN THE RANGE 0-100,000 P. S. I. G. TO CRYSTALLIZE THEREFROM ONE OF SAID COMPONENTS, CONTINUING SAID CRYSTALLIZATION OPERATION UNTIL THE COMPOSITION OF THE RESULTING FIRST MOTHER LIQUOR IS SUBSTANTIALLY THE SAME AS THE COMPOSITION OF THE FIRST EUTECTIC MIXTURE CRYSTALLIZABLE THEREFROM UNDER SAID FIRST CRYSTALLIZATION CONDITION OF PRESSURE, REMOVING THE RESULTING CRYSTALLIZED MATERIAL, SUBJECTING THE RESULTING MOTHER LIQUOR TO SECOND CONDITIONS OF TEMPERATURE AND A PRESSURE IN THE RANGE 0-100,000 P. S. I. G. DIFFERENT FROM SAID FIRST CONDITIONS
Claim 2
Independent Claim
130 words
A METHOD OF FRACTIONALLY CRYSTALLIZING A LIQUID MIXTURE OF COMPONENTS WHICH FORM A EUTECTIC MIXTURE THE COMPOSITION AND MELTING POINT OF WHICH VARIES WITH THE PRESSURE APPLIED TO SAID LIQUID MIXTURE DURING CRYSTALLIZATION, WHICH COMPRISES SUBJECTING SAID LIQUID MIXTURE TO FRACTIONAL CRYSTALLIZATION UNDER FIRST CONDITIONS OF TEMPERATURE AND A PRESSURE IN THE RANGE 0-100,000 P. S. I. G. TO CRYSTALLIZE THEREFROM ONE OF SAID COMPONENTS, CONTINUING SAID CRYSTALLIZATION OPERATION UNTIL THE COMPOSITION OF THE RESULTING FIRST MOTHER LIQUOR IS SUBSTANTIALLY THE SAME AS THE COMPOSITION OF THE FIRST EUTECTIC MIXTURE CRYSTALLIZABLE THEREFROM UNDER SAID FIRST CRYSTALLIZATION CONDITION OF PRESSURE, REMOVING THE RESULTING CRYSTALLIZED MATERIAL, SUBJECTING THE RESULTING MOTHER LIQUOR TO SECOND CONDITIONS OF TEMPERATURE AND A PRESSURE IN THE RANGE 0-100,000 P. S. I. G. DIFFERENT FROM SAID FIRST CONDITIONS
References Cited (Backward Citations)
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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) | 1961-11-17 | 1962-05-19 | 1962-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-17 | 1966-05-19 | 1966-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-17 | 1970-05-19 | 1970-11-18 | $7700.00 | Window Closed / Lapsed |