US3600155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sodium purification process
Assignee: United States Atomic Energy Commission
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Filing: 1969-09-16
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Granted: 1971-08-17
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Expires: 1989-09-16
Abstract
Abstract A PROCESS FOR THE PURIFICATION OF SODIUM WHEREIN SODIUM IS HEATED OR COOLED TO A TEMPERATURE JUST ABOVE ITS MELTING POINT SUCH THAT IMPURITIES, SUCH AS SODIUM OXIDE, WHICH ARE VERY NEARLY INSOLUBLE IN SODIUM AT THIS TEMPERATURE, RISE TO THE SURFACE OF THE POOL OF SODIUM, WHEREAFTER THE SODIUM BELOW THE SURFACE, WHICH IS ESSENTIALLY FREE OF IMPURITIES, IS REMOVED. THIS PROCESS IS APPLICABLE FOR PRODUCING PURIFIED SODIUM FOR GENERAL USE, BUT IS PARTICULARLY EFFECTIVE IN A CONTINUOUS OPERATION AS REQUIRED IN CIRCULATING SYSTEMS SUCH AS NUCLEAR REACTORS, HEAT EXCHANGERS, RESEARCH LOOPS, ETC. WHERE CONTINUOUS REMOVAL OF IMPURITIES IS REQUIRED.
Inventors
- 👤 Paul F De Vries
- 👤 James M Scarborough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:04
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-16 | 1975-02-15 | 1975-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-16 | 1979-02-15 | 1979-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-16 | 1983-02-15 | 1983-08-17 | $7700.00 | Window Closed / Lapsed |