US3701638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lithium isotope separation
Assignee: Mitsubishi Chemical Aqua Solutions Co Ltd
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Filing: 1968-09-26
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Granted: 1972-10-31
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Expires: 1988-09-26
Abstract
Abstract A SOLUTION CONTAINING LITHIUM ISOTOPE IONS IS TREATED WITH AT LEAST ONE CATION EXCHANGER TO CAUSE ADSORPTION OF THE LITHIUM IONS ON THE CATION EXCHANGER, WHICH IS THEN TREATED WITH AN ELUENT IN THE FORM OF A SOLUTION OF A WATERSOLUBLE COMPOUND OF A METAL OTHER THAN LITHIUM IN A WATER OR A POLAR SOLVENT TO CAUSE ELUTION OF THE LITHIUM IONS. D R A W I N G
Inventors
- 👤 Zenji Hagiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:29
CPC Classifications
B; B01; B01D; B01D59/00; B01D59/28; B01D59/30
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |