US3785990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a generator which produces radio-isotopes and has an improved elution efficiency,and generator obtained by this method
Assignee: Individual
•
Filing: 1972-02-29
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Granted: 1974-01-15
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Expires: 1992-02-29
Abstract
Abstract IT HAS BEEN FOUND THAT THE ELUTION EFFICIENCY OF GENERATORS WHICH PRODUCE RADIOACTIVE ISOTOPES AND CONTAIN AL2O3 AS THE ADSORBENT MAY BE GREATLY IMPROVED. THE IMPROVEMENT IS OBTAINED BY PROVIDING THE ADSORBENT OF THE GENERATOR WITH AN OXIDANT BEFORE FIRST USE OF THE GENERATOR. THE OXIDANT MUST HAVE A STRONG AFFINITY FOR THE SUBSTRATE. SUITABLE OXIDANTS ARE CHROMATES AND DICHROMATES.
Inventors
- 👤 H Benjamins
- 👤 Finda H Panek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:39
CPC Classifications
G; G21; G21G; G21G4/00; G21G4/04; G21G1/00; G21G1/0005
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |