Patent US3201229A successfully refreshed from Google Patents.
US3201229A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cesium production
Assignee: Dow Chemical Co
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Filing: 1961-12-20
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Granted: 1965-08-17
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Expires: 1981-12-20
Abstract
No abstract record available.
Inventors
- 👤 Robert D Blue
- 👤 Robert J Moolenaar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:18
CPC Classifications
C; C22; C22B; C22B26/00; C22B26/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A METHOD OF PRODUCING CESIUM FROM ACESIUM HALIDE WHICH COMPRISES: HEATING A BATH OF CESIUM HALIDE AND AN ALKALI METAL HALIDE WHEREIN THE ALKALI METAL IS OTHER THAN CESIUM IN A CLOSED CONTAINER TO A TEMPERATURE AT WHICH SAID BATH IS MOLTEN AND MAINTAINING SAID BATH IN A MOLTEN STATE AT A TEMPERATURE BELOW THE BOILING POINT OF CESIUM; POSITIONING WITHIN SAID BATH A PAIR OF ELECTRODES; ELECTRICALLY CONNECTING SAID ELECTRODES TO A DIRECT CURRENT SOURCE AND PASSING CURRENT THROUGH SAID BATH BETWEEN SAID ELECTRODES, THEREBY PRODUCING GESEOUS HALOGEN AND ALKALI METAL; REMOVING SAID GASEOUS HALOGEN, AS PRODUCED, FROM CONTACT WITH SAID BATH; DISCONNECTING SAID DIRECT CURRENT SOURCE; EVACUATING THE CONTAINER WHILE HEATING THE METAL-SALT BATH MIXTURE TO A TEMPERATURE ABOVE THE BOILING POINT OF CESIUM, THEREBY DISTILLING CESIUM FROM SAID BATH MIXTURE AS IT IS REDUCED BY SAID ALKALI METAL PRODUCED FROM SAID ELECTROLYSIS; AND COLLECTING SAID CESIUM.
Claim 2
Independent Claim
149 words
A METHOD OF PRODUCING CESIUM FROM ACESIUM HALIDE WHICH COMPRISES: HEATING A BATH OF CESIUM HALIDE AND AN ALKALI METAL HALIDE WHEREIN THE ALKALI METAL IS OTHER THAN CESIUM IN A CLOSED CONTAINER TO A TEMPERATURE AT WHICH SAID BATH IS MOLTEN AND MAINTAINING SAID BATH IN A MOLTEN STATE AT A TEMPERATURE BELOW THE BOILING POINT OF CESIUM; POSITIONING WITHIN SAID BATH A PAIR OF ELECTRODES; ELECTRICALLY CONNECTING SAID ELECTRODES TO A DIRECT CURRENT SOURCE AND PASSING CURRENT THROUGH SAID BATH BETWEEN SAID ELECTRODES, THEREBY PRODUCING GESEOUS HALOGEN AND ALKALI METAL; REMOVING SAID GASEOUS HALOGEN, AS PRODUCED, FROM CONTACT WITH SAID BATH; DISCONNECTING SAID DIRECT CURRENT SOURCE; EVACUATING THE CONTAINER WHILE HEATING THE METAL-SALT BATH MIXTURE TO A TEMPERATURE ABOVE THE BOILING POINT OF CESIUM, THEREBY DISTILLING CESIUM FROM SAID BATH MIXTURE AS IT IS REDUCED BY SAID ALKALI METAL PRODUCED FROM SAID ELECTROLYSIS; AND COLLECTING SAID CESIUM.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |