Patent US3845682A successfully refreshed from Google Patents.
Patent US2863757A successfully refreshed from Google Patents.
US2863757A
Expired / Lapsed
US
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Process for the removal of calcium from sodium
Assignee: EIDP Inc
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Filing: 1956-12-23
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Granted: 1958-12-09
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Expires: 1976-12-23
Abstract
No abstract record available.
Inventors
- 👤 David F Altimier
- 👤 Charles H Lemke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:38
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN THE PROCESS FOR REMOVING CALCIUM FROM SODIUM THE STEPS COMPRISING INTIMATELY MIXING A GAS MIXTURE WITH MOLTEN SODIUM AT A TEMPERATURE BELOW 300*C., SAID GAS MIXTURE COMPRISING UPWARDS OF ABOUT 98% BY VOLUME OF A GAS INERT TO SODIUM AT TEMPERATURES BELOW 300*C. AND LESS THAN ABOUT 2% BY VOLUME OF OXYGEN, RECIRCULAING SAID GAS MIXTURE AND REPLENISHING THE OXYGEN IN SAID GAS MIXTURE TO MAINTAIN THE OXYGEN THEREIN AT A CONCENTRATION BELOW ABOUT 2% AND ABOVE ABOUT 0.1* AND CONTINUING SAID RECIRCULATION UNTIL AT LEAST ALL THE CALCIUM ABOVE 25 P. P. M. OF THE SODIUM IS SEPARABLE THEREFROM BY PHYSICAL MEANS.
Claim 2
Dependent Claim
104 words
IN THE PROCESS FOR REMOVING CALCIUM FROM SODIUM THE STEPS COMPRISING INTIMATELY MIXING A GAS MIXTURE WITH MOLTEN SODIUM AT A TEMPERATURE BELOW 300*C., SAID GAS MIXTURE COMPRISING UPWARDS OF ABOUT 98% BY VOLUME OF A GAS INERT TO SODIUM AT TEMPERATURES BELOW 300*C. AND LESS THAN ABOUT 2% BY VOLUME OF OXYGEN, RECIRCULAING SAID GAS MIXTURE AND REPLENISHING THE OXYGEN IN SAID GAS MIXTURE TO MAINTAIN THE OXYGEN THEREIN AT A CONCENTRATION BELOW ABOUT 2% AND ABOVE ABOUT 0.1* AND CONTINUING SAID RECIRCULATION UNTIL AT LEAST ALL THE CALCIUM ABOVE 25 P. P. M. OF THE SODIUM IS SEPARABLE THEREFROM BY PHYSICAL MEANS.
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) | 1961-12-08 | 1962-06-09 | 1962-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-12-08 | 1966-06-09 | 1966-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-12-08 | 1970-06-09 | 1970-12-09 | $7700.00 | Window Closed / Lapsed |