US2671716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the operation of an evaporative crystallization apparatus
Assignee: Phillips Petroleum Co
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Filing: 1949-11-10
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Granted: 1954-03-09
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Expires: 1969-11-10
Abstract
No abstract record available.
Inventors
- 👤 Elwyn C Ayres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:20
CPC Classifications
B; B01; B01D; B01D9/00; B01D9/0018; B01D9/0022; B01D9/0036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR THE OPERATION OF AN EVAPORATIVE CRYSTALLIZATION APPARATUS OF THE TYPE DESCRIBED WHICH COMPRISES WITHDRAWING A MAGMA OF CRYSTALS AND MOTHER LIQUOR FROM A CRYSTALLIZATION ZONE, RECYCLING AT LEAST A PORTION OF THIS MAGMA BELOW THE POINT OF WITHDRAWAL FROM THE EVAPORATIVE CRYSTALLIZATION ZONE, CONTINUOUSLY CIRCULATING THE MAGMA THROUGH THE WITHDRAWAL AND RECYCLE LINES AT A RATE GREATER THAN THAT AT WHICH THE MAGMA IS WITHDRAWN FROM THESE LINES AND SEPARATED INTO CRYSTALS AND MOTHR LIQUOR, AND BY SAID RAPID CIRCULATION REDUCING THE TENDENCY OF OF SALTING-UP IN THE WITHDRAWAL LINES, AND CONTROLLING THE SIZE OF SAID CRYSTALS IN SAID MAGMA BY RECYCLING THE DESIRED AMOUNT OF SAID MAGMA INTO THE TOP OF SAID CRYSTALLIZATION ZONE TO PROVIDE GROWTH OF SAID CRYSTALS IN SAID MAGMA TO THE DESIRED SIZE.
Claim 2
Dependent Claim
131 words
A PROCESS FOR THE OPERATION OF AN EVAPORATIVE CRYSTALLIZATION APPARATUS OF THE TYPE DESCRIBED WHICH COMPRISES WITHDRAWING A MAGMA OF CRYSTALS AND MOTHER LIQUOR FROM A CRYSTALLIZATION ZONE, RECYCLING AT LEAST A PORTION OF THIS MAGMA BELOW THE POINT OF WITHDRAWAL FROM THE EVAPORATIVE CRYSTALLIZATION ZONE, CONTINUOUSLY CIRCULATING THE MAGMA THROUGH THE WITHDRAWAL AND RECYCLE LINES AT A RATE GREATER THAN THAT AT WHICH THE MAGMA IS WITHDRAWN FROM THESE LINES AND SEPARATED INTO CRYSTALS AND MOTHR LIQUOR, AND BY SAID RAPID CIRCULATION REDUCING THE TENDENCY OF OF SALTING-UP IN THE WITHDRAWAL LINES, AND CONTROLLING THE SIZE OF SAID CRYSTALS IN SAID MAGMA BY RECYCLING THE DESIRED AMOUNT OF SAID MAGMA INTO THE TOP OF SAID CRYSTALLIZATION ZONE TO PROVIDE GROWTH OF SAID CRYSTALS IN SAID MAGMA TO THE DESIRED SIZE.
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) | 1957-03-08 | 1957-09-07 | 1958-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-08 | 1961-09-07 | 1962-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-08 | 1965-09-07 | 1966-03-09 | $7700.00 | Window Closed / Lapsed |