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Patent US2737451A successfully refreshed from Google Patents.
US2737451A
Expired / Lapsed
US
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Crystallization
Assignee: Tennessee Valley Authority
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Filing: 1953-08-03
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Granted: 1956-03-06
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Expires: 1973-08-03
Abstract
No abstract record available.
Inventors
- 👤 Walter C Saeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:39
CPC Classifications
C; C01; C01C; C01C1/00; C01C1/18; B; B01; B01D; B01D9/00; B01D9/0018; B01D9/0022; B01D9/0036
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
THE PROCESS FOR CRYSTALLIZING AMMONIUM NITRATE WHICH COMPRISES MAINTAINING WITHIN A CRYSTALLIZING VESSEL A MOVING SUSPENSION OF CRYSTALLINE AMMONIUM NITRATE IN A SOLUTION OF AMMONIUM NITRATE HAVING AN AVERAGE SUPERSATURATION OF ABOUT 3 POUNDS OF AMMONIUM NITRATE PER 1000 GALLONS OF SOLUTION, THE UPPER ONE-SIXTH TO ONE-THIRD OF THE DEPTH OF SAID SUSPENSION BEING VERTICALLY DIVIDED INTO TWO ZONES, ONE OF WHICH IS OF SUBSTANTIALLY GREATER AREA THAN THE OTHER; INTRODUCING INTO THE LOWER PART OF SAID SUSPENSION A STREAM OF AMMONIUM NITRATE SOLUTION HAVING A SUPERSATURATION OF ABOUT 8 TO 14 POUNDS OF AMMONIUM NITRATE PER 1000 GALLONS, AND CARRYING IN SUSPENSION CRYSTALS OF AMMONIUM NITRATE; WITHDRAWING FROM THE SMALLER OF THE TWO SAID UPPER ZONES A SUSPENSION OF COARSE AND MEDIUMSIZE CRYSTALS IN A SATURATED SOLUTION AT SUCH A RATE THAT THE CONTENTS OF THE ENTIRE SYSTEM ARE CIRCULATED 0.3 TO 0.6 TIMES PER MINUTE; INTRODUCING THE SUSPENSION THUS WITHDRAWN FROM SAID SMALLER UPPER ZONE INTO AN EVAPORATOR; THEREIN CONCENTRATING THE SOLUTION TO A SUSPERSATURATION OF ABOUT 8 TO 14 POUNDS PER 1000 GALLONS; REINTRODUCING THE
Claim 2
Dependent Claim
178 words
THE PROCESS FOR CRYSTALLIZING AMMONIUM NITRATE WHICH COMPRISES MAINTAINING WITHIN A CRYSTALLIZING VESSEL A MOVING SUSPENSION OF CRYSTALLINE AMMONIUM NITRATE IN A SOLUTION OF AMMONIUM NITRATE HAVING AN AVERAGE SUPERSATURATION OF ABOUT 3 POUNDS OF AMMONIUM NITRATE PER 1000 GALLONS OF SOLUTION, THE UPPER ONE-SIXTH TO ONE-THIRD OF THE DEPTH OF SAID SUSPENSION BEING VERTICALLY DIVIDED INTO TWO ZONES, ONE OF WHICH IS OF SUBSTANTIALLY GREATER AREA THAN THE OTHER; INTRODUCING INTO THE LOWER PART OF SAID SUSPENSION A STREAM OF AMMONIUM NITRATE SOLUTION HAVING A SUPERSATURATION OF ABOUT 8 TO 14 POUNDS OF AMMONIUM NITRATE PER 1000 GALLONS, AND CARRYING IN SUSPENSION CRYSTALS OF AMMONIUM NITRATE; WITHDRAWING FROM THE SMALLER OF THE TWO SAID UPPER ZONES A SUSPENSION OF COARSE AND MEDIUMSIZE CRYSTALS IN A SATURATED SOLUTION AT SUCH A RATE THAT THE CONTENTS OF THE ENTIRE SYSTEM ARE CIRCULATED 0.3 TO 0.6 TIMES PER MINUTE; INTRODUCING THE SUSPENSION THUS WITHDRAWN FROM SAID SMALLER UPPER ZONE INTO AN EVAPORATOR; THEREIN CONCENTRATING THE SOLUTION TO A SUSPERSATURATION OF ABOUT 8 TO 14 POUNDS PER 1000 GALLONS; REINTRODUCING THE
References Cited (Backward Citations)
US2164112A
Cited
US2567968A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |