US3830746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing technetium-99m generators loaded with fission product molybdenum-99
Assignee: Mallinckrodt Inc
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Filing: 1972-07-27
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Granted: 1974-08-20
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Expires: 1992-07-27
Abstract
Abstract A METHOD FOR PREPARING A TECHNETIUM-99M GENERATOR WHOSE SODIUM PERTECHNETATE ELUATES HAVE A VERY LOW MOLYBDENUM AND ALUMINUM CONTENT. LOW MOLYBDENUM CONTENT OF THE ELUATE IS REALIZED BY INITTIALLY HEAT-ACTIVATING THE ALUMINA USED FOR THE GENERATOR COLUMN. THE HEATACTIVATED ALUMINA COLUMN IS LOADED BY TREATING IT WITH A SOLUTION OF PH 3-4 CONTAINING MOLYBDATE IONS WHOSE MOLYBDENUM CONTENT CONSISTS ESSENTIALLY OF MOLYBDENUM99.
Inventors
- 👤 J Brown
- 👤 O Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:57
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/04
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |